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Finding the Fourth Proportional to 8,772.10, 13,158.12 and 2,928.70

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Solution

The fourth proportional to 8,772.10, 13,158.12 and 2,928.70 is: 4,393.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,772.10 : 13,158.12 = 2,928.70 : x
  2. Step 2: Convert to fraction form
    8,772.10/13,158.12 = 2,928.70/x
  3. Step 3: Cross multiply
    8,772.10x = 13,158.12 × 2,928.70
  4. Step 4: Simplify right side
    8,772.10x = 38,536,186.04
  5. Step 5: Solve for x
    x = 38,536,186.04/8,772.10
  6. Step 6: Final answer
    x = 4,393.04

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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.