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Finding the Fourth Proportional to 26,505.76, 39,758.64 and 8,987.92

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Solution

The fourth proportional to 26,505.76, 39,758.64 and 8,987.92 is: 13,481.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,505.76 : 39,758.64 = 8,987.92 : x
  2. Step 2: Convert to fraction form
    26,505.76/39,758.64 = 8,987.92/x
  3. Step 3: Cross multiply
    26,505.76x = 39,758.64 × 8,987.92
  4. Step 4: Simplify right side
    26,505.76x = 357,347,475.63
  5. Step 5: Solve for x
    x = 357,347,475.63/26,505.76
  6. Step 6: Final answer
    x = 13,481.88

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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.