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Finding the Fourth Proportional to 7,220.69, 9,964.72 and 4,076.88

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Solution

The fourth proportional to 7,220.69, 9,964.72 and 4,076.88 is: 5,626.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,220.69 : 9,964.72 = 4,076.88 : x
  2. Step 2: Convert to fraction form
    7,220.69/9,964.72 = 4,076.88/x
  3. Step 3: Cross multiply
    7,220.69x = 9,964.72 × 4,076.88
  4. Step 4: Simplify right side
    7,220.69x = 40,624,967.67
  5. Step 5: Solve for x
    x = 40,624,967.67/7,220.69
  6. Step 6: Final answer
    x = 5,626.19

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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.