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Finding the Fourth Proportional to 12,349.80, 18,524.70 and 11,547.90

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Solution

The fourth proportional to 12,349.80, 18,524.70 and 11,547.90 is: 17,321.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,349.80 : 18,524.70 = 11,547.90 : x
  2. Step 2: Convert to fraction form
    12,349.80/18,524.70 = 11,547.90/x
  3. Step 3: Cross multiply
    12,349.80x = 18,524.70 × 11,547.90
  4. Step 4: Simplify right side
    12,349.80x = 213,921,383.13
  5. Step 5: Solve for x
    x = 213,921,383.13/12,349.80
  6. Step 6: Final answer
    x = 17,321.85

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Similar ratio
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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.