Home / 20,071.18-30,101.10-12,664.54

Finding the Fourth Proportional to 20,071.18, 30,101.10 and 12,664.54

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Solution

The fourth proportional to 20,071.18, 30,101.10 and 12,664.54 is: 18,993.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,071.18 : 30,101.10 = 12,664.54 : x
  2. Step 2: Convert to fraction form
    20,071.18/30,101.10 = 12,664.54/x
  3. Step 3: Cross multiply
    20,071.18x = 30,101.10 × 12,664.54
  4. Step 4: Simplify right side
    20,071.18x = 381,216,584.99
  5. Step 5: Solve for x
    x = 381,216,584.99/20,071.18
  6. Step 6: Final answer
    x = 18,993.23

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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.