Home / 20,983.14-31,479.35-6,947.55

Finding the Fourth Proportional to 20,983.14, 31,479.35 and 6,947.55

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Solution

The fourth proportional to 20,983.14, 31,479.35 and 6,947.55 is: 10,422.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,983.14 : 31,479.35 = 6,947.55 : x
  2. Step 2: Convert to fraction form
    20,983.14/31,479.35 = 6,947.55/x
  3. Step 3: Cross multiply
    20,983.14x = 31,479.35 × 6,947.55
  4. Step 4: Simplify right side
    20,983.14x = 218,704,323.35
  5. Step 5: Solve for x
    x = 218,704,323.35/20,983.14
  6. Step 6: Final answer
    x = 10,422.86

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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.