Home / 20,211.80-30,315.47-5,422.19

Finding the Fourth Proportional to 20,211.80, 30,315.47 and 5,422.19

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Solution

The fourth proportional to 20,211.80, 30,315.47 and 5,422.19 is: 8,132.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,211.80 : 30,315.47 = 5,422.19 : x
  2. Step 2: Convert to fraction form
    20,211.80/30,315.47 = 5,422.19/x
  3. Step 3: Cross multiply
    20,211.80x = 30,315.47 × 5,422.19
  4. Step 4: Simplify right side
    20,211.80x = 164,376,059.59
  5. Step 5: Solve for x
    x = 164,376,059.59/20,211.80
  6. Step 6: Final answer
    x = 8,132.68

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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.