Home / 21,101.50-29,123.97-13,557.26

Finding the Fourth Proportional to 21,101.50, 29,123.97 and 13,557.26

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Solution

The fourth proportional to 21,101.50, 29,123.97 and 13,557.26 is: 18,711.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,101.50 : 29,123.97 = 13,557.26 : x
  2. Step 2: Convert to fraction form
    21,101.50/29,123.97 = 13,557.26/x
  3. Step 3: Cross multiply
    21,101.50x = 29,123.97 × 13,557.26
  4. Step 4: Simplify right side
    21,101.50x = 394,841,255.49
  5. Step 5: Solve for x
    x = 394,841,255.49/21,101.50
  6. Step 6: Final answer
    x = 18,711.52

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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.