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Finding the Fourth Proportional to 7,312.70, 10,981.20 and 4,028.15

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Solution

The fourth proportional to 7,312.70, 10,981.20 and 4,028.15 is: 6,048.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,312.70 : 10,981.20 = 4,028.15 : x
  2. Step 2: Convert to fraction form
    7,312.70/10,981.20 = 4,028.15/x
  3. Step 3: Cross multiply
    7,312.70x = 10,981.20 × 4,028.15
  4. Step 4: Simplify right side
    7,312.70x = 44,233,920.78
  5. Step 5: Solve for x
    x = 44,233,920.78/7,312.70
  6. Step 6: Final answer
    x = 6,048.92

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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.