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Finding the Fourth Proportional to 15,034.40, 20,746.96 and 8,320.31

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Solution

The fourth proportional to 15,034.40, 20,746.96 and 8,320.31 is: 11,481.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,034.40 : 20,746.96 = 8,320.31 : x
  2. Step 2: Convert to fraction form
    15,034.40/20,746.96 = 8,320.31/x
  3. Step 3: Cross multiply
    15,034.40x = 20,746.96 × 8,320.31
  4. Step 4: Simplify right side
    15,034.40x = 172,621,201.03
  5. Step 5: Solve for x
    x = 172,621,201.03/15,034.40
  6. Step 6: Final answer
    x = 11,481.75

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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.