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Finding the Fourth Proportional to 25,387.31, 38,080.98 and 6,919.31

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Solution

The fourth proportional to 25,387.31, 38,080.98 and 6,919.31 is: 10,378.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,387.31 : 38,080.98 = 6,919.31 : x
  2. Step 2: Convert to fraction form
    25,387.31/38,080.98 = 6,919.31/x
  3. Step 3: Cross multiply
    25,387.31x = 38,080.98 × 6,919.31
  4. Step 4: Simplify right side
    25,387.31x = 263,494,200.93
  5. Step 5: Solve for x
    x = 263,494,200.93/25,387.31
  6. Step 6: Final answer
    x = 10,378.97

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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.