Home / 21,641.90-29,867.82-13,581.32

Finding the Fourth Proportional to 21,641.90, 29,867.82 and 13,581.32

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Solution

The fourth proportional to 21,641.90, 29,867.82 and 13,581.32 is: 18,743.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,641.90 : 29,867.82 = 13,581.32 : x
  2. Step 2: Convert to fraction form
    21,641.90/29,867.82 = 13,581.32/x
  3. Step 3: Cross multiply
    21,641.90x = 29,867.82 × 13,581.32
  4. Step 4: Simplify right side
    21,641.90x = 405,644,421.12
  5. Step 5: Solve for x
    x = 405,644,421.12/21,641.90
  6. Step 6: Final answer
    x = 18,743.48

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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.