Home / 20,811.47-31,202.61-7,662.13

Finding the Fourth Proportional to 20,811.47, 31,202.61 and 7,662.13

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Solution

The fourth proportional to 20,811.47, 31,202.61 and 7,662.13 is: 11,487.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,811.47 : 31,202.61 = 7,662.13 : x
  2. Step 2: Convert to fraction form
    20,811.47/31,202.61 = 7,662.13/x
  3. Step 3: Cross multiply
    20,811.47x = 31,202.61 × 7,662.13
  4. Step 4: Simplify right side
    20,811.47x = 239,078,454.16
  5. Step 5: Solve for x
    x = 239,078,454.16/20,811.47
  6. Step 6: Final answer
    x = 11,487.82

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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.