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Finding the Fourth Proportional to 15,660.11, 21,606.71 and 8,944.40

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Solution

The fourth proportional to 15,660.11, 21,606.71 and 8,944.40 is: 12,340.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,660.11 : 21,606.71 = 8,944.40 : x
  2. Step 2: Convert to fraction form
    15,660.11/21,606.71 = 8,944.40/x
  3. Step 3: Cross multiply
    15,660.11x = 21,606.71 × 8,944.40
  4. Step 4: Simplify right side
    15,660.11x = 193,259,056.92
  5. Step 5: Solve for x
    x = 193,259,056.92/15,660.11
  6. Step 6: Final answer
    x = 12,340.85

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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.