Home / 20,011.28-30,016.98-5,220.18

Finding the Fourth Proportional to 20,011.28, 30,016.98 and 5,220.18

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Solution

The fourth proportional to 20,011.28, 30,016.98 and 5,220.18 is: 7,830.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,011.28 : 30,016.98 = 5,220.18 : x
  2. Step 2: Convert to fraction form
    20,011.28/30,016.98 = 5,220.18/x
  3. Step 3: Cross multiply
    20,011.28x = 30,016.98 × 5,220.18
  4. Step 4: Simplify right side
    20,011.28x = 156,694,038.66
  5. Step 5: Solve for x
    x = 156,694,038.66/20,011.28
  6. Step 6: Final answer
    x = 7,830.29

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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.