Home / 20,690.92-31,022.78-13,649.46

Finding the Fourth Proportional to 20,690.92, 31,022.78 and 13,649.46

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Solution

The fourth proportional to 20,690.92, 31,022.78 and 13,649.46 is: 20,465.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,690.92 : 31,022.78 = 13,649.46 : x
  2. Step 2: Convert to fraction form
    20,690.92/31,022.78 = 13,649.46/x
  3. Step 3: Cross multiply
    20,690.92x = 31,022.78 × 13,649.46
  4. Step 4: Simplify right side
    20,690.92x = 423,444,194.70
  5. Step 5: Solve for x
    x = 423,444,194.70/20,690.92
  6. Step 6: Final answer
    x = 20,465.22

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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.