Home / 20,876.46-31,315.25-5,295.30

Finding the Fourth Proportional to 20,876.46, 31,315.25 and 5,295.30

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Solution

The fourth proportional to 20,876.46, 31,315.25 and 5,295.30 is: 7,943.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,876.46 : 31,315.25 = 5,295.30 : x
  2. Step 2: Convert to fraction form
    20,876.46/31,315.25 = 5,295.30/x
  3. Step 3: Cross multiply
    20,876.46x = 31,315.25 × 5,295.30
  4. Step 4: Simplify right side
    20,876.46x = 165,823,643.33
  5. Step 5: Solve for x
    x = 165,823,643.33/20,876.46
  6. Step 6: Final answer
    x = 7,943.09

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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.