Home / 20,822.18-31,235.14-6,778.56

Finding the Fourth Proportional to 20,822.18, 31,235.14 and 6,778.56

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Solution

The fourth proportional to 20,822.18, 31,235.14 and 6,778.56 is: 10,168.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,822.18 : 31,235.14 = 6,778.56 : x
  2. Step 2: Convert to fraction form
    20,822.18/31,235.14 = 6,778.56/x
  3. Step 3: Cross multiply
    20,822.18x = 31,235.14 × 6,778.56
  4. Step 4: Simplify right side
    20,822.18x = 211,729,270.60
  5. Step 5: Solve for x
    x = 211,729,270.60/20,822.18
  6. Step 6: Final answer
    x = 10,168.45

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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.