Home / 31,301.68-43,198.32-20,672.68

Finding the Fourth Proportional to 31,301.68, 43,198.32 and 20,672.68

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Solution

The fourth proportional to 31,301.68, 43,198.32 and 20,672.68 is: 28,529.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,301.68 : 43,198.32 = 20,672.68 : x
  2. Step 2: Convert to fraction form
    31,301.68/43,198.32 = 20,672.68/x
  3. Step 3: Cross multiply
    31,301.68x = 43,198.32 × 20,672.68
  4. Step 4: Simplify right side
    31,301.68x = 893,025,045.90
  5. Step 5: Solve for x
    x = 893,025,045.90/31,301.68
  6. Step 6: Final answer
    x = 28,529.62

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.