Home / 28,108.60-42,171.14-8,387.80

Finding the Fourth Proportional to 28,108.60, 42,171.14 and 8,387.80

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Solution

The fourth proportional to 28,108.60, 42,171.14 and 8,387.80 is: 12,584.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,108.60 : 42,171.14 = 8,387.80 : x
  2. Step 2: Convert to fraction form
    28,108.60/42,171.14 = 8,387.80/x
  3. Step 3: Cross multiply
    28,108.60x = 42,171.14 × 8,387.80
  4. Step 4: Simplify right side
    28,108.60x = 353,723,088.09
  5. Step 5: Solve for x
    x = 353,723,088.09/28,108.60
  6. Step 6: Final answer
    x = 12,584.16

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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.