Home / 20,958.90-31,454.16-11,100.40

Finding the Fourth Proportional to 20,958.90, 31,454.16 and 11,100.40

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Solution

The fourth proportional to 20,958.90, 31,454.16 and 11,100.40 is: 16,658.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,958.90 : 31,454.16 = 11,100.40 : x
  2. Step 2: Convert to fraction form
    20,958.90/31,454.16 = 11,100.40/x
  3. Step 3: Cross multiply
    20,958.90x = 31,454.16 × 11,100.40
  4. Step 4: Simplify right side
    20,958.90x = 349,153,757.66
  5. Step 5: Solve for x
    x = 349,153,757.66/20,958.90
  6. Step 6: Final answer
    x = 16,658.97

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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.