Home / 21,939.24-30,275.97-12,379.20

Finding the Fourth Proportional to 21,939.24, 30,275.97 and 12,379.20

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Solution

The fourth proportional to 21,939.24, 30,275.97 and 12,379.20 is: 17,083.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,939.24 : 30,275.97 = 12,379.20 : x
  2. Step 2: Convert to fraction form
    21,939.24/30,275.97 = 12,379.20/x
  3. Step 3: Cross multiply
    21,939.24x = 30,275.97 × 12,379.20
  4. Step 4: Simplify right side
    21,939.24x = 374,792,298.17
  5. Step 5: Solve for x
    x = 374,792,298.17/21,939.24
  6. Step 6: Final answer
    x = 17,083.19

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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.