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Finding the Fourth Proportional to 8,759.88, 13,139.96 and 2,916.50

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Solution

The fourth proportional to 8,759.88, 13,139.96 and 2,916.50 is: 4,374.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,759.88 : 13,139.96 = 2,916.50 : x
  2. Step 2: Convert to fraction form
    8,759.88/13,139.96 = 2,916.50/x
  3. Step 3: Cross multiply
    8,759.88x = 13,139.96 × 2,916.50
  4. Step 4: Simplify right side
    8,759.88x = 38,322,613.06
  5. Step 5: Solve for x
    x = 38,322,613.06/8,759.88
  6. Step 6: Final answer
    x = 4,374.79

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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.