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Finding the Fourth Proportional to 28,589.67, 42,882.45 and 8,867.72

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Solution

The fourth proportional to 28,589.67, 42,882.45 and 8,867.72 is: 13,300.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,589.67 : 42,882.45 = 8,867.72 : x
  2. Step 2: Convert to fraction form
    28,589.67/42,882.45 = 8,867.72/x
  3. Step 3: Cross multiply
    28,589.67x = 42,882.45 × 8,867.72
  4. Step 4: Simplify right side
    28,589.67x = 380,269,345.10
  5. Step 5: Solve for x
    x = 380,269,345.10/28,589.67
  6. Step 6: Final answer
    x = 13,300.94

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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.