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Finding the Fourth Proportional to 7,165.70, 10,761.35 and 5,220.10

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Solution

The fourth proportional to 7,165.70, 10,761.35 and 5,220.10 is: 7,839.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,165.70 : 10,761.35 = 5,220.10 : x
  2. Step 2: Convert to fraction form
    7,165.70/10,761.35 = 5,220.10/x
  3. Step 3: Cross multiply
    7,165.70x = 10,761.35 × 5,220.10
  4. Step 4: Simplify right side
    7,165.70x = 56,175,323.14
  5. Step 5: Solve for x
    x = 56,175,323.14/7,165.70
  6. Step 6: Final answer
    x = 7,839.47

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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.