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Finding the Fourth Proportional to 6,489.79, 8,957.87 and 5,614.99

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Solution

The fourth proportional to 6,489.79, 8,957.87 and 5,614.99 is: 7,750.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,489.79 : 8,957.87 = 5,614.99 : x
  2. Step 2: Convert to fraction form
    6,489.79/8,957.87 = 5,614.99/x
  3. Step 3: Cross multiply
    6,489.79x = 8,957.87 × 5,614.99
  4. Step 4: Simplify right side
    6,489.79x = 50,298,350.47
  5. Step 5: Solve for x
    x = 50,298,350.47/6,489.79
  6. Step 6: Final answer
    x = 7,750.38

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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.