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Finding the Fourth Proportional to 29,213.88, 40,320.22 and 28,241.88

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Solution

The fourth proportional to 29,213.88, 40,320.22 and 28,241.88 is: 38,978.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,213.88 : 40,320.22 = 28,241.88 : x
  2. Step 2: Convert to fraction form
    29,213.88/40,320.22 = 28,241.88/x
  3. Step 3: Cross multiply
    29,213.88x = 40,320.22 × 28,241.88
  4. Step 4: Simplify right side
    29,213.88x = 1,138,718,814.81
  5. Step 5: Solve for x
    x = 1,138,718,814.81/29,213.88
  6. Step 6: Final answer
    x = 38,978.69

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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.