Home / 21,411.28-32,082.36-13,186

Finding the Fourth Proportional to 21,411.28, 32,082.36 and 13,186

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Solution

The fourth proportional to 21,411.28, 32,082.36 and 13,186 is: 19,757.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,411.28 : 32,082.36 = 13,186 : x
  2. Step 2: Convert to fraction form
    21,411.28/32,082.36 = 13,186/x
  3. Step 3: Cross multiply
    21,411.28x = 32,082.36 × 13,186
  4. Step 4: Simplify right side
    21,411.28x = 423,037,998.96
  5. Step 5: Solve for x
    x = 423,037,998.96/21,411.28
  6. Step 6: Final answer
    x = 19,757.72

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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.