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Finding the Fourth Proportional to 8,818.64, 12,141.96 and 7,714.64

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Solution

The fourth proportional to 8,818.64, 12,141.96 and 7,714.64 is: 10,621.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,818.64 : 12,141.96 = 7,714.64 : x
  2. Step 2: Convert to fraction form
    8,818.64/12,141.96 = 7,714.64/x
  3. Step 3: Cross multiply
    8,818.64x = 12,141.96 × 7,714.64
  4. Step 4: Simplify right side
    8,818.64x = 93,670,850.29
  5. Step 5: Solve for x
    x = 93,670,850.29/8,818.64
  6. Step 6: Final answer
    x = 10,621.92

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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.