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Finding the Fourth Proportional to 11,387.76, 17,079.76 and 8,090.88

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Solution

The fourth proportional to 11,387.76, 17,079.76 and 8,090.88 is: 12,134.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,387.76 : 17,079.76 = 8,090.88 : x
  2. Step 2: Convert to fraction form
    11,387.76/17,079.76 = 8,090.88/x
  3. Step 3: Cross multiply
    11,387.76x = 17,079.76 × 8,090.88
  4. Step 4: Simplify right side
    11,387.76x = 138,190,288.59
  5. Step 5: Solve for x
    x = 138,190,288.59/11,387.76
  6. Step 6: Final answer
    x = 12,134.98

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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.