Home / 20,010.80-30,013.56-5,220.72

Finding the Fourth Proportional to 20,010.80, 30,013.56 and 5,220.72

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Solution

The fourth proportional to 20,010.80, 30,013.56 and 5,220.72 is: 7,830.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,010.80 : 30,013.56 = 5,220.72 : x
  2. Step 2: Convert to fraction form
    20,010.80/30,013.56 = 5,220.72/x
  3. Step 3: Cross multiply
    20,010.80x = 30,013.56 × 5,220.72
  4. Step 4: Simplify right side
    20,010.80x = 156,692,392.96
  5. Step 5: Solve for x
    x = 156,692,392.96/20,010.80
  6. Step 6: Final answer
    x = 7,830.39

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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.