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Finding the Fourth Proportional to 7,487.55, 11,243.88 and 7,189.58

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Solution

The fourth proportional to 7,487.55, 11,243.88 and 7,189.58 is: 10,796.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,487.55 : 11,243.88 = 7,189.58 : x
  2. Step 2: Convert to fraction form
    7,487.55/11,243.88 = 7,189.58/x
  3. Step 3: Cross multiply
    7,487.55x = 11,243.88 × 7,189.58
  4. Step 4: Simplify right side
    7,487.55x = 80,838,718.55
  5. Step 5: Solve for x
    x = 80,838,718.55/7,487.55
  6. Step 6: Final answer
    x = 10,796.42

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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.