Home / 21,296.28-29,380.20-12,898.20

Finding the Fourth Proportional to 21,296.28, 29,380.20 and 12,898.20

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Solution

The fourth proportional to 21,296.28, 29,380.20 and 12,898.20 is: 17,794.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,296.28 : 29,380.20 = 12,898.20 : x
  2. Step 2: Convert to fraction form
    21,296.28/29,380.20 = 12,898.20/x
  3. Step 3: Cross multiply
    21,296.28x = 29,380.20 × 12,898.20
  4. Step 4: Simplify right side
    21,296.28x = 378,951,695.64
  5. Step 5: Solve for x
    x = 378,951,695.64/21,296.28
  6. Step 6: Final answer
    x = 17,794.27

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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.