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Finding the Fourth Proportional to 12,480.76, 18,715.94 and 5,080.20

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Solution

The fourth proportional to 12,480.76, 18,715.94 and 5,080.20 is: 7,618.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,480.76 : 18,715.94 = 5,080.20 : x
  2. Step 2: Convert to fraction form
    12,480.76/18,715.94 = 5,080.20/x
  3. Step 3: Cross multiply
    12,480.76x = 18,715.94 × 5,080.20
  4. Step 4: Simplify right side
    12,480.76x = 95,080,718.39
  5. Step 5: Solve for x
    x = 95,080,718.39/12,480.76
  6. Step 6: Final answer
    x = 7,618.18

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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.