Home / 12,981.40-19,470.66-3,747.40

Finding the Fourth Proportional to 12,981.40, 19,470.66 and 3,747.40

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Solution

The fourth proportional to 12,981.40, 19,470.66 and 3,747.40 is: 5,620.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,981.40 : 19,470.66 = 3,747.40 : x
  2. Step 2: Convert to fraction form
    12,981.40/19,470.66 = 3,747.40/x
  3. Step 3: Cross multiply
    12,981.40x = 19,470.66 × 3,747.40
  4. Step 4: Simplify right side
    12,981.40x = 72,964,351.28
  5. Step 5: Solve for x
    x = 72,964,351.28/12,981.40
  6. Step 6: Final answer
    x = 5,620.68

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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.