Home / 21,353.12-29,476.68-13,294.16

Finding the Fourth Proportional to 21,353.12, 29,476.68 and 13,294.16

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Solution

The fourth proportional to 21,353.12, 29,476.68 and 13,294.16 is: 18,351.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,353.12 : 29,476.68 = 13,294.16 : x
  2. Step 2: Convert to fraction form
    21,353.12/29,476.68 = 13,294.16/x
  3. Step 3: Cross multiply
    21,353.12x = 29,476.68 × 13,294.16
  4. Step 4: Simplify right side
    21,353.12x = 391,867,700.19
  5. Step 5: Solve for x
    x = 391,867,700.19/21,353.12
  6. Step 6: Final answer
    x = 18,351.78

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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.