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Finding the Fourth Proportional to 47,879.28, 71,817.88 and 12,818.92

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Solution

The fourth proportional to 47,879.28, 71,817.88 and 12,818.92 is: 19,228.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,879.28 : 71,817.88 = 12,818.92 : x
  2. Step 2: Convert to fraction form
    47,879.28/71,817.88 = 12,818.92/x
  3. Step 3: Cross multiply
    47,879.28x = 71,817.88 × 12,818.92
  4. Step 4: Simplify right side
    47,879.28x = 920,627,658.29
  5. Step 5: Solve for x
    x = 920,627,658.29/47,879.28
  6. Step 6: Final answer
    x = 19,228.10

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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.