Home / 28,246.57-38,981-15,500.31

Finding the Fourth Proportional to 28,246.57, 38,981 and 15,500.31

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Solution

The fourth proportional to 28,246.57, 38,981 and 15,500.31 is: 21,390.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,246.57 : 38,981 = 15,500.31 : x
  2. Step 2: Convert to fraction form
    28,246.57/38,981 = 15,500.31/x
  3. Step 3: Cross multiply
    28,246.57x = 38,981 × 15,500.31
  4. Step 4: Simplify right side
    28,246.57x = 604,217,584.11
  5. Step 5: Solve for x
    x = 604,217,584.11/28,246.57
  6. Step 6: Final answer
    x = 21,390.83

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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.