Home / 20,346.40-28,077.78-12,388.60

Finding the Fourth Proportional to 20,346.40, 28,077.78 and 12,388.60

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Solution

The fourth proportional to 20,346.40, 28,077.78 and 12,388.60 is: 17,096.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,346.40 : 28,077.78 = 12,388.60 : x
  2. Step 2: Convert to fraction form
    20,346.40/28,077.78 = 12,388.60/x
  3. Step 3: Cross multiply
    20,346.40x = 28,077.78 × 12,388.60
  4. Step 4: Simplify right side
    20,346.40x = 347,844,385.31
  5. Step 5: Solve for x
    x = 347,844,385.31/20,346.40
  6. Step 6: Final answer
    x = 17,096.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.