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Finding the Fourth Proportional to 5,792.70, 8,689.05 and 5,139.90

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Solution

The fourth proportional to 5,792.70, 8,689.05 and 5,139.90 is: 7,709.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,792.70 : 8,689.05 = 5,139.90 : x
  2. Step 2: Convert to fraction form
    5,792.70/8,689.05 = 5,139.90/x
  3. Step 3: Cross multiply
    5,792.70x = 8,689.05 × 5,139.90
  4. Step 4: Simplify right side
    5,792.70x = 44,660,848.10
  5. Step 5: Solve for x
    x = 44,660,848.10/5,792.70
  6. Step 6: Final answer
    x = 7,709.85

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.