Home / 21,480.13-29,641.80-11,920.44

Finding the Fourth Proportional to 21,480.13, 29,641.80 and 11,920.44

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Solution

The fourth proportional to 21,480.13, 29,641.80 and 11,920.44 is: 16,449.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,480.13 : 29,641.80 = 11,920.44 : x
  2. Step 2: Convert to fraction form
    21,480.13/29,641.80 = 11,920.44/x
  3. Step 3: Cross multiply
    21,480.13x = 29,641.80 × 11,920.44
  4. Step 4: Simplify right side
    21,480.13x = 353,343,253.99
  5. Step 5: Solve for x
    x = 353,343,253.99/21,480.13
  6. Step 6: Final answer
    x = 16,449.77

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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.