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Finding the Fourth Proportional to 30,190.96, 45,301.02 and 20,839.11

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Solution

The fourth proportional to 30,190.96, 45,301.02 and 20,839.11 is: 31,268.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,190.96 : 45,301.02 = 20,839.11 : x
  2. Step 2: Convert to fraction form
    30,190.96/45,301.02 = 20,839.11/x
  3. Step 3: Cross multiply
    30,190.96x = 45,301.02 × 20,839.11
  4. Step 4: Simplify right side
    30,190.96x = 944,032,938.89
  5. Step 5: Solve for x
    x = 944,032,938.89/30,190.96
  6. Step 6: Final answer
    x = 31,268.73

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1.5x scale

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.