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Finding the Fourth Proportional to 6,618.98, 9,913.35 and 3,158.66

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Solution

The fourth proportional to 6,618.98, 9,913.35 and 3,158.66 is: 4,730.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,618.98 : 9,913.35 = 3,158.66 : x
  2. Step 2: Convert to fraction form
    6,618.98/9,913.35 = 3,158.66/x
  3. Step 3: Cross multiply
    6,618.98x = 9,913.35 × 3,158.66
  4. Step 4: Simplify right side
    6,618.98x = 31,312,938.74
  5. Step 5: Solve for x
    x = 31,312,938.74/6,618.98
  6. Step 6: Final answer
    x = 4,730.78

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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.