Home / 15,819.28-23,732.55-5,431

Finding the Fourth Proportional to 15,819.28, 23,732.55 and 5,431

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Solution

The fourth proportional to 15,819.28, 23,732.55 and 5,431 is: 8,147.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,819.28 : 23,732.55 = 5,431 : x
  2. Step 2: Convert to fraction form
    15,819.28/23,732.55 = 5,431/x
  3. Step 3: Cross multiply
    15,819.28x = 23,732.55 × 5,431
  4. Step 4: Simplify right side
    15,819.28x = 128,891,479.05
  5. Step 5: Solve for x
    x = 128,891,479.05/15,819.28
  6. Step 6: Final answer
    x = 8,147.75

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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.