Home / 21,102.38-29,125.17-13,558.14

Finding the Fourth Proportional to 21,102.38, 29,125.17 and 13,558.14

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Solution

The fourth proportional to 21,102.38, 29,125.17 and 13,558.14 is: 18,712.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,102.38 : 29,125.17 = 13,558.14 : x
  2. Step 2: Convert to fraction form
    21,102.38/29,125.17 = 13,558.14/x
  3. Step 3: Cross multiply
    21,102.38x = 29,125.17 × 13,558.14
  4. Step 4: Simplify right side
    21,102.38x = 394,882,986.76
  5. Step 5: Solve for x
    x = 394,882,986.76/21,102.38
  6. Step 6: Final answer
    x = 18,712.73

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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.