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Finding the Fourth Proportional to 13,969.95, 20,948.31 and 5,079.08

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Solution

The fourth proportional to 13,969.95, 20,948.31 and 5,079.08 is: 7,616.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,969.95 : 20,948.31 = 5,079.08 : x
  2. Step 2: Convert to fraction form
    13,969.95/20,948.31 = 5,079.08/x
  3. Step 3: Cross multiply
    13,969.95x = 20,948.31 × 5,079.08
  4. Step 4: Simplify right side
    13,969.95x = 106,398,037.61
  5. Step 5: Solve for x
    x = 106,398,037.61/13,969.95
  6. Step 6: Final answer
    x = 7,616.21

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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.