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Finding the Fourth Proportional to 11,373.64, 15,690.26 and 6,655

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Solution

The fourth proportional to 11,373.64, 15,690.26 and 6,655 is: 9,180.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,373.64 : 15,690.26 = 6,655 : x
  2. Step 2: Convert to fraction form
    11,373.64/15,690.26 = 6,655/x
  3. Step 3: Cross multiply
    11,373.64x = 15,690.26 × 6,655
  4. Step 4: Simplify right side
    11,373.64x = 104,418,680.30
  5. Step 5: Solve for x
    x = 104,418,680.30/11,373.64
  6. Step 6: Final answer
    x = 9,180.76

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.