Home / 21,213.96-29,276.22-12,717.48

Finding the Fourth Proportional to 21,213.96, 29,276.22 and 12,717.48

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Solution

The fourth proportional to 21,213.96, 29,276.22 and 12,717.48 is: 17,550.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,213.96 : 29,276.22 = 12,717.48 : x
  2. Step 2: Convert to fraction form
    21,213.96/29,276.22 = 12,717.48/x
  3. Step 3: Cross multiply
    21,213.96x = 29,276.22 × 12,717.48
  4. Step 4: Simplify right side
    21,213.96x = 372,319,742.33
  5. Step 5: Solve for x
    x = 372,319,742.33/21,213.96
  6. Step 6: Final answer
    x = 17,550.70

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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.