Home / 12,540.71-18,811.84-4,220.03

Finding the Fourth Proportional to 12,540.71, 18,811.84 and 4,220.03

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Solution

The fourth proportional to 12,540.71, 18,811.84 and 4,220.03 is: 6,330.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,540.71 : 18,811.84 = 4,220.03 : x
  2. Step 2: Convert to fraction form
    12,540.71/18,811.84 = 4,220.03/x
  3. Step 3: Cross multiply
    12,540.71x = 18,811.84 × 4,220.03
  4. Step 4: Simplify right side
    12,540.71x = 79,386,529.16
  5. Step 5: Solve for x
    x = 79,386,529.16/12,540.71
  6. Step 6: Final answer
    x = 6,330.31

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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.