Home / 21,976.38-30,321.25-13,800.87

Finding the Fourth Proportional to 21,976.38, 30,321.25 and 13,800.87

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Solution

The fourth proportional to 21,976.38, 30,321.25 and 13,800.87 is: 19,041.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,976.38 : 30,321.25 = 13,800.87 : x
  2. Step 2: Convert to fraction form
    21,976.38/30,321.25 = 13,800.87/x
  3. Step 3: Cross multiply
    21,976.38x = 30,321.25 × 13,800.87
  4. Step 4: Simplify right side
    21,976.38x = 418,459,558.91
  5. Step 5: Solve for x
    x = 418,459,558.91/21,976.38
  6. Step 6: Final answer
    x = 19,041.33

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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.