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Finding the Fourth Proportional to 7,168.20, 9,892.02 and 3,981.50

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Solution

The fourth proportional to 7,168.20, 9,892.02 and 3,981.50 is: 5,494.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,168.20 : 9,892.02 = 3,981.50 : x
  2. Step 2: Convert to fraction form
    7,168.20/9,892.02 = 3,981.50/x
  3. Step 3: Cross multiply
    7,168.20x = 9,892.02 × 3,981.50
  4. Step 4: Simplify right side
    7,168.20x = 39,385,135.84
  5. Step 5: Solve for x
    x = 39,385,135.84/7,168.20
  6. Step 6: Final answer
    x = 5,494.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.