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Finding the Fourth Proportional to 15,132.75, 20,884.86 and 8,673

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Solution

The fourth proportional to 15,132.75, 20,884.86 and 8,673 is: 11,969.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,132.75 : 20,884.86 = 8,673 : x
  2. Step 2: Convert to fraction form
    15,132.75/20,884.86 = 8,673/x
  3. Step 3: Cross multiply
    15,132.75x = 20,884.86 × 8,673
  4. Step 4: Simplify right side
    15,132.75x = 181,134,390.78
  5. Step 5: Solve for x
    x = 181,134,390.78/15,132.75
  6. Step 6: Final answer
    x = 11,969.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.