Home / 30,116.31-45,149.00-18,998.55

Finding the Fourth Proportional to 30,116.31, 45,149.00 and 18,998.55

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Solution

The fourth proportional to 30,116.31, 45,149.00 and 18,998.55 is: 28,481.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,116.31 : 45,149.00 = 18,998.55 : x
  2. Step 2: Convert to fraction form
    30,116.31/45,149.00 = 18,998.55/x
  3. Step 3: Cross multiply
    30,116.31x = 45,149.00 × 18,998.55
  4. Step 4: Simplify right side
    30,116.31x = 857,765,438.96
  5. Step 5: Solve for x
    x = 857,765,438.96/30,116.31
  6. Step 6: Final answer
    x = 28,481.76

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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.