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Finding the Fourth Proportional to 12,191.70, 18,309.15 and 9,425.10

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Solution

The fourth proportional to 12,191.70, 18,309.15 and 9,425.10 is: 14,154.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,191.70 : 18,309.15 = 9,425.10 : x
  2. Step 2: Convert to fraction form
    12,191.70/18,309.15 = 9,425.10/x
  3. Step 3: Cross multiply
    12,191.70x = 18,309.15 × 9,425.10
  4. Step 4: Simplify right side
    12,191.70x = 172,565,569.67
  5. Step 5: Solve for x
    x = 172,565,569.67/12,191.70
  6. Step 6: Final answer
    x = 14,154.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.