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Finding the Fourth Proportional to 8,871.36, 12,247.65 and 5,891.28

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Solution

The fourth proportional to 8,871.36, 12,247.65 and 5,891.28 is: 8,133.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,871.36 : 12,247.65 = 5,891.28 : x
  2. Step 2: Convert to fraction form
    8,871.36/12,247.65 = 5,891.28/x
  3. Step 3: Cross multiply
    8,871.36x = 12,247.65 × 5,891.28
  4. Step 4: Simplify right side
    8,871.36x = 72,154,335.49
  5. Step 5: Solve for x
    x = 72,154,335.49/8,871.36
  6. Step 6: Final answer
    x = 8,133.40

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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.