Home / 28,301.20-42,451.80-8,578.78

Finding the Fourth Proportional to 28,301.20, 42,451.80 and 8,578.78

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Solution

The fourth proportional to 28,301.20, 42,451.80 and 8,578.78 is: 12,868.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,301.20 : 42,451.80 = 8,578.78 : x
  2. Step 2: Convert to fraction form
    28,301.20/42,451.80 = 8,578.78/x
  3. Step 3: Cross multiply
    28,301.20x = 42,451.80 × 8,578.78
  4. Step 4: Simplify right side
    28,301.20x = 364,184,652.80
  5. Step 5: Solve for x
    x = 364,184,652.80/28,301.20
  6. Step 6: Final answer
    x = 12,868.17

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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.