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Finding the Fourth Proportional to 8,607.65, 12,916.16 and 3,342.86

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Solution

The fourth proportional to 8,607.65, 12,916.16 and 3,342.86 is: 5,016.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,607.65 : 12,916.16 = 3,342.86 : x
  2. Step 2: Convert to fraction form
    8,607.65/12,916.16 = 3,342.86/x
  3. Step 3: Cross multiply
    8,607.65x = 12,916.16 × 3,342.86
  4. Step 4: Simplify right side
    8,607.65x = 43,176,914.62
  5. Step 5: Solve for x
    x = 43,176,914.62/8,607.65
  6. Step 6: Final answer
    x = 5,016.11

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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.