Home / 28,493.68-39,321.13-15,747.76

Finding the Fourth Proportional to 28,493.68, 39,321.13 and 15,747.76

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Solution

The fourth proportional to 28,493.68, 39,321.13 and 15,747.76 is: 21,731.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,493.68 : 39,321.13 = 15,747.76 : x
  2. Step 2: Convert to fraction form
    28,493.68/39,321.13 = 15,747.76/x
  3. Step 3: Cross multiply
    28,493.68x = 39,321.13 × 15,747.76
  4. Step 4: Simplify right side
    28,493.68x = 619,219,718.17
  5. Step 5: Solve for x
    x = 619,219,718.17/28,493.68
  6. Step 6: Final answer
    x = 21,731.83

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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.