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Finding the Fourth Proportional to 15,179.93, 20,934.65 and 9,515.25

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Solution

The fourth proportional to 15,179.93, 20,934.65 and 9,515.25 is: 13,122.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,179.93 : 20,934.65 = 9,515.25 : x
  2. Step 2: Convert to fraction form
    15,179.93/20,934.65 = 9,515.25/x
  3. Step 3: Cross multiply
    15,179.93x = 20,934.65 × 9,515.25
  4. Step 4: Simplify right side
    15,179.93x = 199,198,428.41
  5. Step 5: Solve for x
    x = 199,198,428.41/15,179.93
  6. Step 6: Final answer
    x = 13,122.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.