Home / 30,540.20-42,146.69-17,111.57

Finding the Fourth Proportional to 30,540.20, 42,146.69 and 17,111.57

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Solution

The fourth proportional to 30,540.20, 42,146.69 and 17,111.57 is: 23,614.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,540.20 : 42,146.69 = 17,111.57 : x
  2. Step 2: Convert to fraction form
    30,540.20/42,146.69 = 17,111.57/x
  3. Step 3: Cross multiply
    30,540.20x = 42,146.69 × 17,111.57
  4. Step 4: Simplify right side
    30,540.20x = 721,195,739.91
  5. Step 5: Solve for x
    x = 721,195,739.91/30,540.20
  6. Step 6: Final answer
    x = 23,614.64

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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.