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Finding the Fourth Proportional to 12,375.79, 18,566.42 and 6,139.19

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Solution

The fourth proportional to 12,375.79, 18,566.42 and 6,139.19 is: 9,210.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,375.79 : 18,566.42 = 6,139.19 : x
  2. Step 2: Convert to fraction form
    12,375.79/18,566.42 = 6,139.19/x
  3. Step 3: Cross multiply
    12,375.79x = 18,566.42 × 6,139.19
  4. Step 4: Simplify right side
    12,375.79x = 113,982,795.72
  5. Step 5: Solve for x
    x = 113,982,795.72/12,375.79
  6. Step 6: Final answer
    x = 9,210.14

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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.