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Finding the Fourth Proportional to 28,482.85, 42,720.59 and 8,760.97

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Solution

The fourth proportional to 28,482.85, 42,720.59 and 8,760.97 is: 13,140.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,482.85 : 42,720.59 = 8,760.97 : x
  2. Step 2: Convert to fraction form
    28,482.85/42,720.59 = 8,760.97/x
  3. Step 3: Cross multiply
    28,482.85x = 42,720.59 × 8,760.97
  4. Step 4: Simplify right side
    28,482.85x = 374,273,722.47
  5. Step 5: Solve for x
    x = 374,273,722.47/28,482.85
  6. Step 6: Final answer
    x = 13,140.32

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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.