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Finding the Fourth Proportional to 9,988.76, 13,787.72 and 6,449.24

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Solution

The fourth proportional to 9,988.76, 13,787.72 and 6,449.24 is: 8,902.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,988.76 : 13,787.72 = 6,449.24 : x
  2. Step 2: Convert to fraction form
    9,988.76/13,787.72 = 6,449.24/x
  3. Step 3: Cross multiply
    9,988.76x = 13,787.72 × 6,449.24
  4. Step 4: Simplify right side
    9,988.76x = 88,920,214.15
  5. Step 5: Solve for x
    x = 88,920,214.15/9,988.76
  6. Step 6: Final answer
    x = 8,902.03

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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.