Home / 20,190,323.70-30,285,485.55-12,128,166.90

Finding the Fourth Proportional to 20,190,323.70, 30,285,485.55 and 12,128,166.90

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Solution

The fourth proportional to 20,190,323.70, 30,285,485.55 and 12,128,166.90 is: 18,192,250.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,190,323.70 : 30,285,485.55 = 12,128,166.90 : x
  2. Step 2: Convert to fraction form
    20,190,323.70/30,285,485.55 = 12,128,166.90/x
  3. Step 3: Cross multiply
    20,190,323.70x = 30,285,485.55 × 12,128,166.90
  4. Step 4: Simplify right side
    20,190,323.70x = 367,307,423,397,938.31
  5. Step 5: Solve for x
    x = 367,307,423,397,938.31/20,190,323.70
  6. Step 6: Final answer
    x = 18,192,250.35

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.