Home / 20,947.40-31,384.20-11,064.90

Finding the Fourth Proportional to 20,947.40, 31,384.20 and 11,064.90

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Solution

The fourth proportional to 20,947.40, 31,384.20 and 11,064.90 is: 16,577.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,947.40 : 31,384.20 = 11,064.90 : x
  2. Step 2: Convert to fraction form
    20,947.40/31,384.20 = 11,064.90/x
  3. Step 3: Cross multiply
    20,947.40x = 31,384.20 × 11,064.90
  4. Step 4: Simplify right side
    20,947.40x = 347,263,034.58
  5. Step 5: Solve for x
    x = 347,263,034.58/20,947.40
  6. Step 6: Final answer
    x = 16,577.86

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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.