Home / 21,231.68-29,299.90-13,278.52

Finding the Fourth Proportional to 21,231.68, 29,299.90 and 13,278.52

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Solution

The fourth proportional to 21,231.68, 29,299.90 and 13,278.52 is: 18,324.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,231.68 : 29,299.90 = 13,278.52 : x
  2. Step 2: Convert to fraction form
    21,231.68/29,299.90 = 13,278.52/x
  3. Step 3: Cross multiply
    21,231.68x = 29,299.90 × 13,278.52
  4. Step 4: Simplify right side
    21,231.68x = 389,059,308.15
  5. Step 5: Solve for x
    x = 389,059,308.15/21,231.68
  6. Step 6: Final answer
    x = 18,324.47

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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.