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Finding the Fourth Proportional to 6,639.71, 9,158.99 and 4,151.39

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Solution

The fourth proportional to 6,639.71, 9,158.99 and 4,151.39 is: 5,726.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,639.71 : 9,158.99 = 4,151.39 : x
  2. Step 2: Convert to fraction form
    6,639.71/9,158.99 = 4,151.39/x
  3. Step 3: Cross multiply
    6,639.71x = 9,158.99 × 4,151.39
  4. Step 4: Simplify right side
    6,639.71x = 38,022,472.94
  5. Step 5: Solve for x
    x = 38,022,472.94/6,639.71
  6. Step 6: Final answer
    x = 5,726.53

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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.