Home / 28,177.35-42,255.09-12,381.75

Finding the Fourth Proportional to 28,177.35, 42,255.09 and 12,381.75

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Solution

The fourth proportional to 28,177.35, 42,255.09 and 12,381.75 is: 18,567.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,177.35 : 42,255.09 = 12,381.75 : x
  2. Step 2: Convert to fraction form
    28,177.35/42,255.09 = 12,381.75/x
  3. Step 3: Cross multiply
    28,177.35x = 42,255.09 × 12,381.75
  4. Step 4: Simplify right side
    28,177.35x = 523,191,960.61
  5. Step 5: Solve for x
    x = 523,191,960.61/28,177.35
  6. Step 6: Final answer
    x = 18,567.82

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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.