Home / 20,220.75-30,331.13-5,628.75

Finding the Fourth Proportional to 20,220.75, 30,331.13 and 5,628.75

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Solution

The fourth proportional to 20,220.75, 30,331.13 and 5,628.75 is: 8,443.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,220.75 : 30,331.13 = 5,628.75 : x
  2. Step 2: Convert to fraction form
    20,220.75/30,331.13 = 5,628.75/x
  3. Step 3: Cross multiply
    20,220.75x = 30,331.13 × 5,628.75
  4. Step 4: Simplify right side
    20,220.75x = 170,726,319.84
  5. Step 5: Solve for x
    x = 170,726,319.84/20,220.75
  6. Step 6: Final answer
    x = 8,443.13

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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.