Home / 20,761.01-31,183.43-12,456.79

Finding the Fourth Proportional to 20,761.01, 31,183.43 and 12,456.79

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Solution

The fourth proportional to 20,761.01, 31,183.43 and 12,456.79 is: 18,710.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,761.01 : 31,183.43 = 12,456.79 : x
  2. Step 2: Convert to fraction form
    20,761.01/31,183.43 = 12,456.79/x
  3. Step 3: Cross multiply
    20,761.01x = 31,183.43 × 12,456.79
  4. Step 4: Simplify right side
    20,761.01x = 388,445,368.82
  5. Step 5: Solve for x
    x = 388,445,368.82/20,761.01
  6. Step 6: Final answer
    x = 18,710.33

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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.