Home / 21,605.44-29,819.28-13,645.12

Finding the Fourth Proportional to 21,605.44, 29,819.28 and 13,645.12

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Solution

The fourth proportional to 21,605.44, 29,819.28 and 13,645.12 is: 18,832.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,605.44 : 29,819.28 = 13,645.12 : x
  2. Step 2: Convert to fraction form
    21,605.44/29,819.28 = 13,645.12/x
  3. Step 3: Cross multiply
    21,605.44x = 29,819.28 × 13,645.12
  4. Step 4: Simplify right side
    21,605.44x = 406,887,653.91
  5. Step 5: Solve for x
    x = 406,887,653.91/21,605.44
  6. Step 6: Final answer
    x = 18,832.65

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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.