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Finding the Fourth Proportional to 31,879.36, 47,818.88 and 8,186.88

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Solution

The fourth proportional to 31,879.36, 47,818.88 and 8,186.88 is: 12,280.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,879.36 : 47,818.88 = 8,186.88 : x
  2. Step 2: Convert to fraction form
    31,879.36/47,818.88 = 8,186.88/x
  3. Step 3: Cross multiply
    31,879.36x = 47,818.88 × 8,186.88
  4. Step 4: Simplify right side
    31,879.36x = 391,487,432.29
  5. Step 5: Solve for x
    x = 391,487,432.29/31,879.36
  6. Step 6: Final answer
    x = 12,280.28

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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.