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Finding the Fourth Proportional to 8,931, 13,397.22 and 2,775

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Solution

The fourth proportional to 8,931, 13,397.22 and 2,775 is: 4,162.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,931 : 13,397.22 = 2,775 : x
  2. Step 2: Convert to fraction form
    8,931/13,397.22 = 2,775/x
  3. Step 3: Cross multiply
    8,931x = 13,397.22 × 2,775
  4. Step 4: Simplify right side
    8,931x = 37,177,285.50
  5. Step 5: Solve for x
    x = 37,177,285.50/8,931
  6. Step 6: Final answer
    x = 4,162.72

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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.