Home / 30,500.82-42,078.60-18,562.20

Finding the Fourth Proportional to 30,500.82, 42,078.60 and 18,562.20

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Solution

The fourth proportional to 30,500.82, 42,078.60 and 18,562.20 is: 25,608.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,500.82 : 42,078.60 = 18,562.20 : x
  2. Step 2: Convert to fraction form
    30,500.82/42,078.60 = 18,562.20/x
  3. Step 3: Cross multiply
    30,500.82x = 42,078.60 × 18,562.20
  4. Step 4: Simplify right side
    30,500.82x = 781,071,388.92
  5. Step 5: Solve for x
    x = 781,071,388.92/30,500.82
  6. Step 6: Final answer
    x = 25,608.21

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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.