Home / 21,213.48-29,274.18-11,781.72

Finding the Fourth Proportional to 21,213.48, 29,274.18 and 11,781.72

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Solution

The fourth proportional to 21,213.48, 29,274.18 and 11,781.72 is: 16,258.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,213.48 : 29,274.18 = 11,781.72 : x
  2. Step 2: Convert to fraction form
    21,213.48/29,274.18 = 11,781.72/x
  3. Step 3: Cross multiply
    21,213.48x = 29,274.18 × 11,781.72
  4. Step 4: Simplify right side
    21,213.48x = 344,900,191.99
  5. Step 5: Solve for x
    x = 344,900,191.99/21,213.48
  6. Step 6: Final answer
    x = 16,258.54

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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.