Home / 21,456.27-29,616.12-13,903.02

Finding the Fourth Proportional to 21,456.27, 29,616.12 and 13,903.02

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Solution

The fourth proportional to 21,456.27, 29,616.12 and 13,903.02 is: 19,190.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,456.27 : 29,616.12 = 13,903.02 : x
  2. Step 2: Convert to fraction form
    21,456.27/29,616.12 = 13,903.02/x
  3. Step 3: Cross multiply
    21,456.27x = 29,616.12 × 13,903.02
  4. Step 4: Simplify right side
    21,456.27x = 411,753,508.68
  5. Step 5: Solve for x
    x = 411,753,508.68/21,456.27
  6. Step 6: Final answer
    x = 19,190.36

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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.