Home / 20,876.90-31,315.50-7,025.90

Finding the Fourth Proportional to 20,876.90, 31,315.50 and 7,025.90

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Solution

The fourth proportional to 20,876.90, 31,315.50 and 7,025.90 is: 10,538.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,876.90 : 31,315.50 = 7,025.90 : x
  2. Step 2: Convert to fraction form
    20,876.90/31,315.50 = 7,025.90/x
  3. Step 3: Cross multiply
    20,876.90x = 31,315.50 × 7,025.90
  4. Step 4: Simplify right side
    20,876.90x = 220,019,571.45
  5. Step 5: Solve for x
    x = 220,019,571.45/20,876.90
  6. Step 6: Final answer
    x = 10,538.90

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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.