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Finding the Fourth Proportional to 7,236.80, 9,986.88 and 4,254.88

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Solution

The fourth proportional to 7,236.80, 9,986.88 and 4,254.88 is: 5,871.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,236.80 : 9,986.88 = 4,254.88 : x
  2. Step 2: Convert to fraction form
    7,236.80/9,986.88 = 4,254.88/x
  3. Step 3: Cross multiply
    7,236.80x = 9,986.88 × 4,254.88
  4. Step 4: Simplify right side
    7,236.80x = 42,492,975.97
  5. Step 5: Solve for x
    x = 42,492,975.97/7,236.80
  6. Step 6: Final answer
    x = 5,871.79

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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.