Home / 31,780.80-47,671.49-8,088.38

Finding the Fourth Proportional to 31,780.80, 47,671.49 and 8,088.38

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Solution

The fourth proportional to 31,780.80, 47,671.49 and 8,088.38 is: 12,132.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,780.80 : 47,671.49 = 8,088.38 : x
  2. Step 2: Convert to fraction form
    31,780.80/47,671.49 = 8,088.38/x
  3. Step 3: Cross multiply
    31,780.80x = 47,671.49 × 8,088.38
  4. Step 4: Simplify right side
    31,780.80x = 385,584,847.49
  5. Step 5: Solve for x
    x = 385,584,847.49/31,780.80
  6. Step 6: Final answer
    x = 12,132.64

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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.