Home / 21,213.12-29,273.60-11,781.69

Finding the Fourth Proportional to 21,213.12, 29,273.60 and 11,781.69

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Solution

The fourth proportional to 21,213.12, 29,273.60 and 11,781.69 is: 16,258.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,213.12 : 29,273.60 = 11,781.69 : x
  2. Step 2: Convert to fraction form
    21,213.12/29,273.60 = 11,781.69/x
  3. Step 3: Cross multiply
    21,213.12x = 29,273.60 × 11,781.69
  4. Step 4: Simplify right side
    21,213.12x = 344,892,421.48
  5. Step 5: Solve for x
    x = 344,892,421.48/21,213.12
  6. Step 6: Final answer
    x = 16,258.45

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Half scale
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Double scale
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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.