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Finding the Fourth Proportional to 30,343.68, 45,441.68 and 20,958.71

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Solution

The fourth proportional to 30,343.68, 45,441.68 and 20,958.71 is: 31,387.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,343.68 : 45,441.68 = 20,958.71 : x
  2. Step 2: Convert to fraction form
    30,343.68/45,441.68 = 20,958.71/x
  3. Step 3: Cross multiply
    30,343.68x = 45,441.68 × 20,958.71
  4. Step 4: Simplify right side
    30,343.68x = 952,398,661.03
  5. Step 5: Solve for x
    x = 952,398,661.03/30,343.68
  6. Step 6: Final answer
    x = 31,387.05

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.