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Finding the Fourth Proportional to 7,320.70, 10,981.05 and 2,055.70

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Solution

The fourth proportional to 7,320.70, 10,981.05 and 2,055.70 is: 3,083.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,320.70 : 10,981.05 = 2,055.70 : x
  2. Step 2: Convert to fraction form
    7,320.70/10,981.05 = 2,055.70/x
  3. Step 3: Cross multiply
    7,320.70x = 10,981.05 × 2,055.70
  4. Step 4: Simplify right side
    7,320.70x = 22,573,744.49
  5. Step 5: Solve for x
    x = 22,573,744.49/7,320.70
  6. Step 6: Final answer
    x = 3,083.55

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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.