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Finding the Fourth Proportional to 7,245.90, 9,986.63 and 5,979.47

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Solution

The fourth proportional to 7,245.90, 9,986.63 and 5,979.47 is: 8,241.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,245.90 : 9,986.63 = 5,979.47 : x
  2. Step 2: Convert to fraction form
    7,245.90/9,986.63 = 5,979.47/x
  3. Step 3: Cross multiply
    7,245.90x = 9,986.63 × 5,979.47
  4. Step 4: Simplify right side
    7,245.90x = 59,714,674.66
  5. Step 5: Solve for x
    x = 59,714,674.66/7,245.90
  6. Step 6: Final answer
    x = 8,241.17

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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.