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Finding the Fourth Proportional to 5,687.72, 8,562.29 and 5,115.53

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Solution

The fourth proportional to 5,687.72, 8,562.29 and 5,115.53 is: 7,700.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,687.72 : 8,562.29 = 5,115.53 : x
  2. Step 2: Convert to fraction form
    5,687.72/8,562.29 = 5,115.53/x
  3. Step 3: Cross multiply
    5,687.72x = 8,562.29 × 5,115.53
  4. Step 4: Simplify right side
    5,687.72x = 43,800,647.19
  5. Step 5: Solve for x
    x = 43,800,647.19/5,687.72
  6. Step 6: Final answer
    x = 7,700.92

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.