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Finding the Fourth Proportional to 7,231.88, 9,980.72 and 4,399.45

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Solution

The fourth proportional to 7,231.88, 9,980.72 and 4,399.45 is: 6,071.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,231.88 : 9,980.72 = 4,399.45 : x
  2. Step 2: Convert to fraction form
    7,231.88/9,980.72 = 4,399.45/x
  3. Step 3: Cross multiply
    7,231.88x = 9,980.72 × 4,399.45
  4. Step 4: Simplify right side
    7,231.88x = 43,909,664.65
  5. Step 5: Solve for x
    x = 43,909,664.65/7,231.88
  6. Step 6: Final answer
    x = 6,071.68

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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.