Home / 20,876.78-31,315.14-7,025.78

Finding the Fourth Proportional to 20,876.78, 31,315.14 and 7,025.78

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Solution

The fourth proportional to 20,876.78, 31,315.14 and 7,025.78 is: 10,538.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,876.78 : 31,315.14 = 7,025.78 : x
  2. Step 2: Convert to fraction form
    20,876.78/31,315.14 = 7,025.78/x
  3. Step 3: Cross multiply
    20,876.78x = 31,315.14 × 7,025.78
  4. Step 4: Simplify right side
    20,876.78x = 220,013,284.31
  5. Step 5: Solve for x
    x = 220,013,284.31/20,876.78
  6. Step 6: Final answer
    x = 10,538.66

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1.5x scale

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.