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Finding the Fourth Proportional to 12,008.70, 18,012.45 and 6,165.90

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Solution

The fourth proportional to 12,008.70, 18,012.45 and 6,165.90 is: 9,248.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,008.70 : 18,012.45 = 6,165.90 : x
  2. Step 2: Convert to fraction form
    12,008.70/18,012.45 = 6,165.90/x
  3. Step 3: Cross multiply
    12,008.70x = 18,012.45 × 6,165.90
  4. Step 4: Simplify right side
    12,008.70x = 111,062,965.46
  5. Step 5: Solve for x
    x = 111,062,965.46/12,008.70
  6. Step 6: Final answer
    x = 9,248.54

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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.