Home / 18,781.12-28,173.76-8,391.52

Finding the Fourth Proportional to 18,781.12, 28,173.76 and 8,391.52

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Solution

The fourth proportional to 18,781.12, 28,173.76 and 8,391.52 is: 12,588.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,781.12 : 28,173.76 = 8,391.52 : x
  2. Step 2: Convert to fraction form
    18,781.12/28,173.76 = 8,391.52/x
  3. Step 3: Cross multiply
    18,781.12x = 28,173.76 × 8,391.52
  4. Step 4: Simplify right side
    18,781.12x = 236,420,670.52
  5. Step 5: Solve for x
    x = 236,420,670.52/18,781.12
  6. Step 6: Final answer
    x = 12,588.21

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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.