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Finding the Fourth Proportional to 7,274.80, 10,917.60 and 5,420.17

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Solution

The fourth proportional to 7,274.80, 10,917.60 and 5,420.17 is: 8,134.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,274.80 : 10,917.60 = 5,420.17 : x
  2. Step 2: Convert to fraction form
    7,274.80/10,917.60 = 5,420.17/x
  3. Step 3: Cross multiply
    7,274.80x = 10,917.60 × 5,420.17
  4. Step 4: Simplify right side
    7,274.80x = 59,175,247.99
  5. Step 5: Solve for x
    x = 59,175,247.99/7,274.80
  6. Step 6: Final answer
    x = 8,134.28

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1.5x scale

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.