Home / 20,498.90-28,276.70-12,942.54

Finding the Fourth Proportional to 20,498.90, 28,276.70 and 12,942.54

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Solution

The fourth proportional to 20,498.90, 28,276.70 and 12,942.54 is: 17,853.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,498.90 : 28,276.70 = 12,942.54 : x
  2. Step 2: Convert to fraction form
    20,498.90/28,276.70 = 12,942.54/x
  3. Step 3: Cross multiply
    20,498.90x = 28,276.70 × 12,942.54
  4. Step 4: Simplify right side
    20,498.90x = 365,972,256.11
  5. Step 5: Solve for x
    x = 365,972,256.11/20,498.90
  6. Step 6: Final answer
    x = 17,853.27

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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.