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Finding the Fourth Proportional to 7,318.89, 10,989.27 and 7,209.54

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Solution

The fourth proportional to 7,318.89, 10,989.27 and 7,209.54 is: 10,825.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,318.89 : 10,989.27 = 7,209.54 : x
  2. Step 2: Convert to fraction form
    7,318.89/10,989.27 = 7,209.54/x
  3. Step 3: Cross multiply
    7,318.89x = 10,989.27 × 7,209.54
  4. Step 4: Simplify right side
    7,318.89x = 79,227,581.64
  5. Step 5: Solve for x
    x = 79,227,581.64/7,318.89
  6. Step 6: Final answer
    x = 10,825.08

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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.