Home / 20,983.24-31,479.72-6,942.70

Finding the Fourth Proportional to 20,983.24, 31,479.72 and 6,942.70

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Solution

The fourth proportional to 20,983.24, 31,479.72 and 6,942.70 is: 10,415.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,983.24 : 31,479.72 = 6,942.70 : x
  2. Step 2: Convert to fraction form
    20,983.24/31,479.72 = 6,942.70/x
  3. Step 3: Cross multiply
    20,983.24x = 31,479.72 × 6,942.70
  4. Step 4: Simplify right side
    20,983.24x = 218,554,252.04
  5. Step 5: Solve for x
    x = 218,554,252.04/20,983.24
  6. Step 6: Final answer
    x = 10,415.66

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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.