Home / 12,515.20-17,276.16-8,039.20

Finding the Fourth Proportional to 12,515.20, 17,276.16 and 8,039.20

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Solution

The fourth proportional to 12,515.20, 17,276.16 and 8,039.20 is: 11,097.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,515.20 : 17,276.16 = 8,039.20 : x
  2. Step 2: Convert to fraction form
    12,515.20/17,276.16 = 8,039.20/x
  3. Step 3: Cross multiply
    12,515.20x = 17,276.16 × 8,039.20
  4. Step 4: Simplify right side
    12,515.20x = 138,886,505.47
  5. Step 5: Solve for x
    x = 138,886,505.47/12,515.20
  6. Step 6: Final answer
    x = 11,097.43

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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.