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Finding the Fourth Proportional to 12,388.80, 18,574.98 and 4,065.90

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Solution

The fourth proportional to 12,388.80, 18,574.98 and 4,065.90 is: 6,096.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,388.80 : 18,574.98 = 4,065.90 : x
  2. Step 2: Convert to fraction form
    12,388.80/18,574.98 = 4,065.90/x
  3. Step 3: Cross multiply
    12,388.80x = 18,574.98 × 4,065.90
  4. Step 4: Simplify right side
    12,388.80x = 75,524,011.18
  5. Step 5: Solve for x
    x = 75,524,011.18/12,388.80
  6. Step 6: Final answer
    x = 6,096.15

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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.