Home / 21,480.08-29,642.75-11,920.11

Finding the Fourth Proportional to 21,480.08, 29,642.75 and 11,920.11

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Solution

The fourth proportional to 21,480.08, 29,642.75 and 11,920.11 is: 16,449.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,480.08 : 29,642.75 = 11,920.11 : x
  2. Step 2: Convert to fraction form
    21,480.08/29,642.75 = 11,920.11/x
  3. Step 3: Cross multiply
    21,480.08x = 29,642.75 × 11,920.11
  4. Step 4: Simplify right side
    21,480.08x = 353,344,781.10
  5. Step 5: Solve for x
    x = 353,344,781.10/21,480.08
  6. Step 6: Final answer
    x = 16,449.89

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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.