Home / 20,512.79-28,123.05-20,139.14

Finding the Fourth Proportional to 20,512.79, 28,123.05 and 20,139.14

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Solution

The fourth proportional to 20,512.79, 28,123.05 and 20,139.14 is: 27,610.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,512.79 : 28,123.05 = 20,139.14 : x
  2. Step 2: Convert to fraction form
    20,512.79/28,123.05 = 20,139.14/x
  3. Step 3: Cross multiply
    20,512.79x = 28,123.05 × 20,139.14
  4. Step 4: Simplify right side
    20,512.79x = 566,373,940.48
  5. Step 5: Solve for x
    x = 566,373,940.48/20,512.79
  6. Step 6: Final answer
    x = 27,610.77

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.