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Finding the Fourth Proportional to 8,655.22, 12,988.31 and 4,964.66

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Solution

The fourth proportional to 8,655.22, 12,988.31 and 4,964.66 is: 7,450.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,655.22 : 12,988.31 = 4,964.66 : x
  2. Step 2: Convert to fraction form
    8,655.22/12,988.31 = 4,964.66/x
  3. Step 3: Cross multiply
    8,655.22x = 12,988.31 × 4,964.66
  4. Step 4: Simplify right side
    8,655.22x = 64,482,543.12
  5. Step 5: Solve for x
    x = 64,482,543.12/8,655.22
  6. Step 6: Final answer
    x = 7,450.13

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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.