Home / 21,013.15-28,998.28-11,581.71

Finding the Fourth Proportional to 21,013.15, 28,998.28 and 11,581.71

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Solution

The fourth proportional to 21,013.15, 28,998.28 and 11,581.71 is: 15,982.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,013.15 : 28,998.28 = 11,581.71 : x
  2. Step 2: Convert to fraction form
    21,013.15/28,998.28 = 11,581.71/x
  3. Step 3: Cross multiply
    21,013.15x = 28,998.28 × 11,581.71
  4. Step 4: Simplify right side
    21,013.15x = 335,849,611.55
  5. Step 5: Solve for x
    x = 335,849,611.55/21,013.15
  6. Step 6: Final answer
    x = 15,982.83

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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.