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Finding the Fourth Proportional to 25,899.75, 38,856.15 and 7,431.75

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Solution

The fourth proportional to 25,899.75, 38,856.15 and 7,431.75 is: 11,149.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,899.75 : 38,856.15 = 7,431.75 : x
  2. Step 2: Convert to fraction form
    25,899.75/38,856.15 = 7,431.75/x
  3. Step 3: Cross multiply
    25,899.75x = 38,856.15 × 7,431.75
  4. Step 4: Simplify right side
    25,899.75x = 288,769,192.76
  5. Step 5: Solve for x
    x = 288,769,192.76/25,899.75
  6. Step 6: Final answer
    x = 11,149.50

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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.