Home / 21,221.22-29,276.70-12,723.71

Finding the Fourth Proportional to 21,221.22, 29,276.70 and 12,723.71

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Solution

The fourth proportional to 21,221.22, 29,276.70 and 12,723.71 is: 17,553.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,221.22 : 29,276.70 = 12,723.71 : x
  2. Step 2: Convert to fraction form
    21,221.22/29,276.70 = 12,723.71/x
  3. Step 3: Cross multiply
    21,221.22x = 29,276.70 × 12,723.71
  4. Step 4: Simplify right side
    21,221.22x = 372,508,094.17
  5. Step 5: Solve for x
    x = 372,508,094.17/21,221.22
  6. Step 6: Final answer
    x = 17,553.57

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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.