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Finding the Fourth Proportional to 8,937.72, 12,335.12 and 5,161.81

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Solution

The fourth proportional to 8,937.72, 12,335.12 and 5,161.81 is: 7,123.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,937.72 : 12,335.12 = 5,161.81 : x
  2. Step 2: Convert to fraction form
    8,937.72/12,335.12 = 5,161.81/x
  3. Step 3: Cross multiply
    8,937.72x = 12,335.12 × 5,161.81
  4. Step 4: Simplify right side
    8,937.72x = 63,671,458.28
  5. Step 5: Solve for x
    x = 63,671,458.28/8,937.72
  6. Step 6: Final answer
    x = 7,123.90

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1.5x scale

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.