Home / 12,121.81-18,179.19-4,724.52

Finding the Fourth Proportional to 12,121.81, 18,179.19 and 4,724.52

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Solution

The fourth proportional to 12,121.81, 18,179.19 and 4,724.52 is: 7,085.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,121.81 : 18,179.19 = 4,724.52 : x
  2. Step 2: Convert to fraction form
    12,121.81/18,179.19 = 4,724.52/x
  3. Step 3: Cross multiply
    12,121.81x = 18,179.19 × 4,724.52
  4. Step 4: Simplify right side
    12,121.81x = 85,887,946.74
  5. Step 5: Solve for x
    x = 85,887,946.74/12,121.81
  6. Step 6: Final answer
    x = 7,085.41

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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.