Home / 20,812.60-31,169.58-11,932.76

Finding the Fourth Proportional to 20,812.60, 31,169.58 and 11,932.76

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Solution

The fourth proportional to 20,812.60, 31,169.58 and 11,932.76 is: 17,870.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,812.60 : 31,169.58 = 11,932.76 : x
  2. Step 2: Convert to fraction form
    20,812.60/31,169.58 = 11,932.76/x
  3. Step 3: Cross multiply
    20,812.60x = 31,169.58 × 11,932.76
  4. Step 4: Simplify right side
    20,812.60x = 371,939,117.44
  5. Step 5: Solve for x
    x = 371,939,117.44/20,812.60
  6. Step 6: Final answer
    x = 17,870.86

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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.