Home / 20,778.56-31,166.72-6,739.28

Finding the Fourth Proportional to 20,778.56, 31,166.72 and 6,739.28

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Solution

The fourth proportional to 20,778.56, 31,166.72 and 6,739.28 is: 10,108.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,778.56 : 31,166.72 = 6,739.28 : x
  2. Step 2: Convert to fraction form
    20,778.56/31,166.72 = 6,739.28/x
  3. Step 3: Cross multiply
    20,778.56x = 31,166.72 × 6,739.28
  4. Step 4: Simplify right side
    20,778.56x = 210,041,252.76
  5. Step 5: Solve for x
    x = 210,041,252.76/20,778.56
  6. Step 6: Final answer
    x = 10,108.56

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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.