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Finding the Fourth Proportional to 12,060.10, 18,087.45 and 7,929.10

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Solution

The fourth proportional to 12,060.10, 18,087.45 and 7,929.10 is: 11,891.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,060.10 : 18,087.45 = 7,929.10 : x
  2. Step 2: Convert to fraction form
    12,060.10/18,087.45 = 7,929.10/x
  3. Step 3: Cross multiply
    12,060.10x = 18,087.45 × 7,929.10
  4. Step 4: Simplify right side
    12,060.10x = 143,417,199.80
  5. Step 5: Solve for x
    x = 143,417,199.80/12,060.10
  6. Step 6: Final answer
    x = 11,891.87

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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.