Home / 21,517.92-29,703.11-13,558.59

Finding the Fourth Proportional to 21,517.92, 29,703.11 and 13,558.59

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Solution

The fourth proportional to 21,517.92, 29,703.11 and 13,558.59 is: 18,716.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,517.92 : 29,703.11 = 13,558.59 : x
  2. Step 2: Convert to fraction form
    21,517.92/29,703.11 = 13,558.59/x
  3. Step 3: Cross multiply
    21,517.92x = 29,703.11 × 13,558.59
  4. Step 4: Simplify right side
    21,517.92x = 402,732,222.42
  5. Step 5: Solve for x
    x = 402,732,222.42/21,517.92
  6. Step 6: Final answer
    x = 18,716.13

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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.