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Finding the Fourth Proportional to 25,755.90, 38,615.40 and 9,947.40

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Solution

The fourth proportional to 25,755.90, 38,615.40 and 9,947.40 is: 14,913.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,755.90 : 38,615.40 = 9,947.40 : x
  2. Step 2: Convert to fraction form
    25,755.90/38,615.40 = 9,947.40/x
  3. Step 3: Cross multiply
    25,755.90x = 38,615.40 × 9,947.40
  4. Step 4: Simplify right side
    25,755.90x = 384,122,829.96
  5. Step 5: Solve for x
    x = 384,122,829.96/25,755.90
  6. Step 6: Final answer
    x = 14,913.97

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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.