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Finding the Fourth Proportional to 15,140.52, 20,894.89 and 8,426.12

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Solution

The fourth proportional to 15,140.52, 20,894.89 and 8,426.12 is: 11,628.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,140.52 : 20,894.89 = 8,426.12 : x
  2. Step 2: Convert to fraction form
    15,140.52/20,894.89 = 8,426.12/x
  3. Step 3: Cross multiply
    15,140.52x = 20,894.89 × 8,426.12
  4. Step 4: Simplify right side
    15,140.52x = 176,062,850.53
  5. Step 5: Solve for x
    x = 176,062,850.53/15,140.52
  6. Step 6: Final answer
    x = 11,628.59

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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.