Home / 28,006.92-38,647.80-15,431.70

Finding the Fourth Proportional to 28,006.92, 38,647.80 and 15,431.70

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Solution

The fourth proportional to 28,006.92, 38,647.80 and 15,431.70 is: 21,294.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,006.92 : 38,647.80 = 15,431.70 : x
  2. Step 2: Convert to fraction form
    28,006.92/38,647.80 = 15,431.70/x
  3. Step 3: Cross multiply
    28,006.92x = 38,647.80 × 15,431.70
  4. Step 4: Simplify right side
    28,006.92x = 596,401,255.26
  5. Step 5: Solve for x
    x = 596,401,255.26/28,006.92
  6. Step 6: Final answer
    x = 21,294.78

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Similar ratio
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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.