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Finding the Fourth Proportional to 12,387.99, 17,089.85 and 7,352.43

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Solution

The fourth proportional to 12,387.99, 17,089.85 and 7,352.43 is: 10,143.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,387.99 : 17,089.85 = 7,352.43 : x
  2. Step 2: Convert to fraction form
    12,387.99/17,089.85 = 7,352.43/x
  3. Step 3: Cross multiply
    12,387.99x = 17,089.85 × 7,352.43
  4. Step 4: Simplify right side
    12,387.99x = 125,651,925.84
  5. Step 5: Solve for x
    x = 125,651,925.84/12,387.99
  6. Step 6: Final answer
    x = 10,143.04

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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.