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Finding the Fourth Proportional to 8,864.64, 13,359.11 and 7,988.13

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Solution

The fourth proportional to 8,864.64, 13,359.11 and 7,988.13 is: 12,038.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,864.64 : 13,359.11 = 7,988.13 : x
  2. Step 2: Convert to fraction form
    8,864.64/13,359.11 = 7,988.13/x
  3. Step 3: Cross multiply
    8,864.64x = 13,359.11 × 7,988.13
  4. Step 4: Simplify right side
    8,864.64x = 106,714,267.42
  5. Step 5: Solve for x
    x = 106,714,267.42/8,864.64
  6. Step 6: Final answer
    x = 12,038.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.