Home / 21,421.12-29,560.94-11,989.76

Finding the Fourth Proportional to 21,421.12, 29,560.94 and 11,989.76

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Solution

The fourth proportional to 21,421.12, 29,560.94 and 11,989.76 is: 16,545.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,421.12 : 29,560.94 = 11,989.76 : x
  2. Step 2: Convert to fraction form
    21,421.12/29,560.94 = 11,989.76/x
  3. Step 3: Cross multiply
    21,421.12x = 29,560.94 × 11,989.76
  4. Step 4: Simplify right side
    21,421.12x = 354,428,575.97
  5. Step 5: Solve for x
    x = 354,428,575.97/21,421.12
  6. Step 6: Final answer
    x = 16,545.75

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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.