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Finding the Fourth Proportional to 11,118, 15,335.55 and 7,132.80

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Solution

The fourth proportional to 11,118, 15,335.55 and 7,132.80 is: 9,838.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,118 : 15,335.55 = 7,132.80 : x
  2. Step 2: Convert to fraction form
    11,118/15,335.55 = 7,132.80/x
  3. Step 3: Cross multiply
    11,118x = 15,335.55 × 7,132.80
  4. Step 4: Simplify right side
    11,118x = 109,385,411.04
  5. Step 5: Solve for x
    x = 109,385,411.04/11,118
  6. Step 6: Final answer
    x = 9,838.59

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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.