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Finding the Fourth Proportional to 8,702.79, 13,056.89 and 3,158.79

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Solution

The fourth proportional to 8,702.79, 13,056.89 and 3,158.79 is: 4,739.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,702.79 : 13,056.89 = 3,158.79 : x
  2. Step 2: Convert to fraction form
    8,702.79/13,056.89 = 3,158.79/x
  3. Step 3: Cross multiply
    8,702.79x = 13,056.89 × 3,158.79
  4. Step 4: Simplify right side
    8,702.79x = 41,243,957.77
  5. Step 5: Solve for x
    x = 41,243,957.77/8,702.79
  6. Step 6: Final answer
    x = 4,739.16

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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.