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Finding the Fourth Proportional to 12,355.71, 17,032.99 and 7,631.79

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Solution

The fourth proportional to 12,355.71, 17,032.99 and 7,631.79 is: 10,520.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,355.71 : 17,032.99 = 7,631.79 : x
  2. Step 2: Convert to fraction form
    12,355.71/17,032.99 = 7,631.79/x
  3. Step 3: Cross multiply
    12,355.71x = 17,032.99 × 7,631.79
  4. Step 4: Simplify right side
    12,355.71x = 129,992,202.75
  5. Step 5: Solve for x
    x = 129,992,202.75/12,355.71
  6. Step 6: Final answer
    x = 10,520.82

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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.