Home / 21,341.29-29,451.44-11,781.15

Finding the Fourth Proportional to 21,341.29, 29,451.44 and 11,781.15

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Solution

The fourth proportional to 21,341.29, 29,451.44 and 11,781.15 is: 16,258.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,341.29 : 29,451.44 = 11,781.15 : x
  2. Step 2: Convert to fraction form
    21,341.29/29,451.44 = 11,781.15/x
  3. Step 3: Cross multiply
    21,341.29x = 29,451.44 × 11,781.15
  4. Step 4: Simplify right side
    21,341.29x = 346,971,873.54
  5. Step 5: Solve for x
    x = 346,971,873.54/21,341.29
  6. Step 6: Final answer
    x = 16,258.25

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Double scale
Find fourth proportional to 21,342.29, 29,452.82 and 11,782.15
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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.