Home / 20,917.72-31,374.24-6,126.76

Finding the Fourth Proportional to 20,917.72, 31,374.24 and 6,126.76

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Solution

The fourth proportional to 20,917.72, 31,374.24 and 6,126.76 is: 9,189.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,917.72 : 31,374.24 = 6,126.76 : x
  2. Step 2: Convert to fraction form
    20,917.72/31,374.24 = 6,126.76/x
  3. Step 3: Cross multiply
    20,917.72x = 31,374.24 × 6,126.76
  4. Step 4: Simplify right side
    20,917.72x = 192,222,438.66
  5. Step 5: Solve for x
    x = 192,222,438.66/20,917.72
  6. Step 6: Final answer
    x = 9,189.45

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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.