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Finding the Fourth Proportional to 12,585.67, 17,367.85 and 6,920.43

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Solution

The fourth proportional to 12,585.67, 17,367.85 and 6,920.43 is: 9,549.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,585.67 : 17,367.85 = 6,920.43 : x
  2. Step 2: Convert to fraction form
    12,585.67/17,367.85 = 6,920.43/x
  3. Step 3: Cross multiply
    12,585.67x = 17,367.85 × 6,920.43
  4. Step 4: Simplify right side
    12,585.67x = 120,192,990.18
  5. Step 5: Solve for x
    x = 120,192,990.18/12,585.67
  6. Step 6: Final answer
    x = 9,549.99

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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.