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Finding the Fourth Proportional to 8,436.65, 12,635.93 and 4,921.38

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Solution

The fourth proportional to 8,436.65, 12,635.93 and 4,921.38 is: 7,370.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,436.65 : 12,635.93 = 4,921.38 : x
  2. Step 2: Convert to fraction form
    8,436.65/12,635.93 = 4,921.38/x
  3. Step 3: Cross multiply
    8,436.65x = 12,635.93 × 4,921.38
  4. Step 4: Simplify right side
    8,436.65x = 62,186,188.58
  5. Step 5: Solve for x
    x = 62,186,188.58/8,436.65
  6. Step 6: Final answer
    x = 7,370.96

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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.