Home / 28,113.78-42,177.03-8,391.60

Finding the Fourth Proportional to 28,113.78, 42,177.03 and 8,391.60

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Solution

The fourth proportional to 28,113.78, 42,177.03 and 8,391.60 is: 12,589.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,113.78 : 42,177.03 = 8,391.60 : x
  2. Step 2: Convert to fraction form
    28,113.78/42,177.03 = 8,391.60/x
  3. Step 3: Cross multiply
    28,113.78x = 42,177.03 × 8,391.60
  4. Step 4: Simplify right side
    28,113.78x = 353,932,764.95
  5. Step 5: Solve for x
    x = 353,932,764.95/28,113.78
  6. Step 6: Final answer
    x = 12,589.30

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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.