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Finding the Fourth Proportional to 7,718.54, 11,559.33 and 7,331.03

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Solution

The fourth proportional to 7,718.54, 11,559.33 and 7,331.03 is: 10,978.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,718.54 : 11,559.33 = 7,331.03 : x
  2. Step 2: Convert to fraction form
    7,718.54/11,559.33 = 7,331.03/x
  3. Step 3: Cross multiply
    7,718.54x = 11,559.33 × 7,331.03
  4. Step 4: Simplify right side
    7,718.54x = 84,741,795.01
  5. Step 5: Solve for x
    x = 84,741,795.01/7,718.54
  6. Step 6: Final answer
    x = 10,978.99

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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.