Home / 28,501.88-42,757.07-8,778.78

Finding the Fourth Proportional to 28,501.88, 42,757.07 and 8,778.78

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Solution

The fourth proportional to 28,501.88, 42,757.07 and 8,778.78 is: 13,169.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,501.88 : 42,757.07 = 8,778.78 : x
  2. Step 2: Convert to fraction form
    28,501.88/42,757.07 = 8,778.78/x
  3. Step 3: Cross multiply
    28,501.88x = 42,757.07 × 8,778.78
  4. Step 4: Simplify right side
    28,501.88x = 375,354,867.08
  5. Step 5: Solve for x
    x = 375,354,867.08/28,501.88
  6. Step 6: Final answer
    x = 13,169.48

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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.