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Finding the Fourth Proportional to 18,819.64, 25,959.66 and 12,446.20

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Solution

The fourth proportional to 18,819.64, 25,959.66 and 12,446.20 is: 17,168.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,819.64 : 25,959.66 = 12,446.20 : x
  2. Step 2: Convert to fraction form
    18,819.64/25,959.66 = 12,446.20/x
  3. Step 3: Cross multiply
    18,819.64x = 25,959.66 × 12,446.20
  4. Step 4: Simplify right side
    18,819.64x = 323,099,120.29
  5. Step 5: Solve for x
    x = 323,099,120.29/18,819.64
  6. Step 6: Final answer
    x = 17,168.19

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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.