Home / 20,240.81-30,359.03-5,451.21

Finding the Fourth Proportional to 20,240.81, 30,359.03 and 5,451.21

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Solution

The fourth proportional to 20,240.81, 30,359.03 and 5,451.21 is: 8,176.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,240.81 : 30,359.03 = 5,451.21 : x
  2. Step 2: Convert to fraction form
    20,240.81/30,359.03 = 5,451.21/x
  3. Step 3: Cross multiply
    20,240.81x = 30,359.03 × 5,451.21
  4. Step 4: Simplify right side
    20,240.81x = 165,493,420.67
  5. Step 5: Solve for x
    x = 165,493,420.67/20,240.81
  6. Step 6: Final answer
    x = 8,176.23

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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.