Home / 21,358.10-29,484.12-12,403.88

Finding the Fourth Proportional to 21,358.10, 29,484.12 and 12,403.88

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Solution

The fourth proportional to 21,358.10, 29,484.12 and 12,403.88 is: 17,123.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,358.10 : 29,484.12 = 12,403.88 : x
  2. Step 2: Convert to fraction form
    21,358.10/29,484.12 = 12,403.88/x
  3. Step 3: Cross multiply
    21,358.10x = 29,484.12 × 12,403.88
  4. Step 4: Simplify right side
    21,358.10x = 365,717,338.97
  5. Step 5: Solve for x
    x = 365,717,338.97/21,358.10
  6. Step 6: Final answer
    x = 17,123.13

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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.