Home / 30,158.10-41,618.61-18,219.78

Finding the Fourth Proportional to 30,158.10, 41,618.61 and 18,219.78

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Solution

The fourth proportional to 30,158.10, 41,618.61 and 18,219.78 is: 25,143.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,158.10 : 41,618.61 = 18,219.78 : x
  2. Step 2: Convert to fraction form
    30,158.10/41,618.61 = 18,219.78/x
  3. Step 3: Cross multiply
    30,158.10x = 41,618.61 × 18,219.78
  4. Step 4: Simplify right side
    30,158.10x = 758,281,918.11
  5. Step 5: Solve for x
    x = 758,281,918.11/30,158.10
  6. Step 6: Final answer
    x = 25,143.56

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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.