Home / 20,158.36-30,191.42-9,635.78

Finding the Fourth Proportional to 20,158.36, 30,191.42 and 9,635.78

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Solution

The fourth proportional to 20,158.36, 30,191.42 and 9,635.78 is: 14,431.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,158.36 : 30,191.42 = 9,635.78 : x
  2. Step 2: Convert to fraction form
    20,158.36/30,191.42 = 9,635.78/x
  3. Step 3: Cross multiply
    20,158.36x = 30,191.42 × 9,635.78
  4. Step 4: Simplify right side
    20,158.36x = 290,917,980.58
  5. Step 5: Solve for x
    x = 290,917,980.58/20,158.36
  6. Step 6: Final answer
    x = 14,431.63

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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.