Home / 20,761.54-28,650.92-12,808.38

Finding the Fourth Proportional to 20,761.54, 28,650.92 and 12,808.38

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Solution

The fourth proportional to 20,761.54, 28,650.92 and 12,808.38 is: 17,675.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,761.54 : 28,650.92 = 12,808.38 : x
  2. Step 2: Convert to fraction form
    20,761.54/28,650.92 = 12,808.38/x
  3. Step 3: Cross multiply
    20,761.54x = 28,650.92 × 12,808.38
  4. Step 4: Simplify right side
    20,761.54x = 366,971,870.71
  5. Step 5: Solve for x
    x = 366,971,870.71/20,761.54
  6. Step 6: Final answer
    x = 17,675.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.