Home / 20,724.41-31,086.33-12,406.72

Finding the Fourth Proportional to 20,724.41, 31,086.33 and 12,406.72

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Solution

The fourth proportional to 20,724.41, 31,086.33 and 12,406.72 is: 18,609.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,724.41 : 31,086.33 = 12,406.72 : x
  2. Step 2: Convert to fraction form
    20,724.41/31,086.33 = 12,406.72/x
  3. Step 3: Cross multiply
    20,724.41x = 31,086.33 × 12,406.72
  4. Step 4: Simplify right side
    20,724.41x = 385,679,395.97
  5. Step 5: Solve for x
    x = 385,679,395.97/20,724.41
  6. Step 6: Final answer
    x = 18,609.91

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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.