Home / 20,923.20-31,384.80-5,340.60

Finding the Fourth Proportional to 20,923.20, 31,384.80 and 5,340.60

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Solution

The fourth proportional to 20,923.20, 31,384.80 and 5,340.60 is: 8,010.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,923.20 : 31,384.80 = 5,340.60 : x
  2. Step 2: Convert to fraction form
    20,923.20/31,384.80 = 5,340.60/x
  3. Step 3: Cross multiply
    20,923.20x = 31,384.80 × 5,340.60
  4. Step 4: Simplify right side
    20,923.20x = 167,613,662.88
  5. Step 5: Solve for x
    x = 167,613,662.88/20,923.20
  6. Step 6: Final answer
    x = 8,010.90

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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.