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Finding the Fourth Proportional to 12,751.52, 17,589.60 and 8,980.16

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Solution

The fourth proportional to 12,751.52, 17,589.60 and 8,980.16 is: 12,387.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,751.52 : 17,589.60 = 8,980.16 : x
  2. Step 2: Convert to fraction form
    12,751.52/17,589.60 = 8,980.16/x
  3. Step 3: Cross multiply
    12,751.52x = 17,589.60 × 8,980.16
  4. Step 4: Simplify right side
    12,751.52x = 157,957,422.34
  5. Step 5: Solve for x
    x = 157,957,422.34/12,751.52
  6. Step 6: Final answer
    x = 12,387.34

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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.