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Finding the Fourth Proportional to 11,335.44, 16,981.02 and 6,390.12

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Solution

The fourth proportional to 11,335.44, 16,981.02 and 6,390.12 is: 9,572.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,335.44 : 16,981.02 = 6,390.12 : x
  2. Step 2: Convert to fraction form
    11,335.44/16,981.02 = 6,390.12/x
  3. Step 3: Cross multiply
    11,335.44x = 16,981.02 × 6,390.12
  4. Step 4: Simplify right side
    11,335.44x = 108,510,755.52
  5. Step 5: Solve for x
    x = 108,510,755.52/11,335.44
  6. Step 6: Final answer
    x = 9,572.70

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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.