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Finding the Fourth Proportional to 47,191.68, 70,785.90 and 13,910.40

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Solution

The fourth proportional to 47,191.68, 70,785.90 and 13,910.40 is: 20,865.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,191.68 : 70,785.90 = 13,910.40 : x
  2. Step 2: Convert to fraction form
    47,191.68/70,785.90 = 13,910.40/x
  3. Step 3: Cross multiply
    47,191.68x = 70,785.90 × 13,910.40
  4. Step 4: Simplify right side
    47,191.68x = 984,660,183.36
  5. Step 5: Solve for x
    x = 984,660,183.36/47,191.68
  6. Step 6: Final answer
    x = 20,865.12

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1.5x scale

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.