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Finding the Fourth Proportional to 13,916.52, 20,860.20 and 6,515.01

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Solution

The fourth proportional to 13,916.52, 20,860.20 and 6,515.01 is: 9,765.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,916.52 : 20,860.20 = 6,515.01 : x
  2. Step 2: Convert to fraction form
    13,916.52/20,860.20 = 6,515.01/x
  3. Step 3: Cross multiply
    13,916.52x = 20,860.20 × 6,515.01
  4. Step 4: Simplify right side
    13,916.52x = 135,904,411.60
  5. Step 5: Solve for x
    x = 135,904,411.60/13,916.52
  6. Step 6: Final answer
    x = 9,765.69

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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.