Home / 20,439.48-30,680.67-18,114.36

Finding the Fourth Proportional to 20,439.48, 30,680.67 and 18,114.36

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Solution

The fourth proportional to 20,439.48, 30,680.67 and 18,114.36 is: 27,190.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,439.48 : 30,680.67 = 18,114.36 : x
  2. Step 2: Convert to fraction form
    20,439.48/30,680.67 = 18,114.36/x
  3. Step 3: Cross multiply
    20,439.48x = 30,680.67 × 18,114.36
  4. Step 4: Simplify right side
    20,439.48x = 555,760,701.42
  5. Step 5: Solve for x
    x = 555,760,701.42/20,439.48
  6. Step 6: Final answer
    x = 27,190.55

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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.