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Finding the Fourth Proportional to 9,881.10, 14,821.65 and 7,677.90

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Solution

The fourth proportional to 9,881.10, 14,821.65 and 7,677.90 is: 11,516.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,881.10 : 14,821.65 = 7,677.90 : x
  2. Step 2: Convert to fraction form
    9,881.10/14,821.65 = 7,677.90/x
  3. Step 3: Cross multiply
    9,881.10x = 14,821.65 × 7,677.90
  4. Step 4: Simplify right side
    9,881.10x = 113,799,146.54
  5. Step 5: Solve for x
    x = 113,799,146.54/9,881.10
  6. Step 6: Final answer
    x = 11,516.85

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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.