Home / 21,939.29-30,276.10-11,867.70

Finding the Fourth Proportional to 21,939.29, 30,276.10 and 11,867.70

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Solution

The fourth proportional to 21,939.29, 30,276.10 and 11,867.70 is: 16,377.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,939.29 : 30,276.10 = 11,867.70 : x
  2. Step 2: Convert to fraction form
    21,939.29/30,276.10 = 11,867.70/x
  3. Step 3: Cross multiply
    21,939.29x = 30,276.10 × 11,867.70
  4. Step 4: Simplify right side
    21,939.29x = 359,307,671.97
  5. Step 5: Solve for x
    x = 359,307,671.97/21,939.29
  6. Step 6: Final answer
    x = 16,377.36

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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.