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Finding the Fourth Proportional to 15,140.68, 20,894.46 and 8,856.70

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Solution

The fourth proportional to 15,140.68, 20,894.46 and 8,856.70 is: 12,222.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,140.68 : 20,894.46 = 8,856.70 : x
  2. Step 2: Convert to fraction form
    15,140.68/20,894.46 = 8,856.70/x
  3. Step 3: Cross multiply
    15,140.68x = 20,894.46 × 8,856.70
  4. Step 4: Simplify right side
    15,140.68x = 185,055,963.88
  5. Step 5: Solve for x
    x = 185,055,963.88/15,140.68
  6. Step 6: Final answer
    x = 12,222.43

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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.