Home / 28,480.06-42,720.78-8,758.78

Finding the Fourth Proportional to 28,480.06, 42,720.78 and 8,758.78

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Solution

The fourth proportional to 28,480.06, 42,720.78 and 8,758.78 is: 13,138.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,480.06 : 42,720.78 = 8,758.78 : x
  2. Step 2: Convert to fraction form
    28,480.06/42,720.78 = 8,758.78/x
  3. Step 3: Cross multiply
    28,480.06x = 42,720.78 × 8,758.78
  4. Step 4: Simplify right side
    28,480.06x = 374,181,913.45
  5. Step 5: Solve for x
    x = 374,181,913.45/28,480.06
  6. Step 6: Final answer
    x = 13,138.38

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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.