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Finding the Fourth Proportional to 9,279.99, 12,806.91 and 5,505.39

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Solution

The fourth proportional to 9,279.99, 12,806.91 and 5,505.39 is: 7,597.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,279.99 : 12,806.91 = 5,505.39 : x
  2. Step 2: Convert to fraction form
    9,279.99/12,806.91 = 5,505.39/x
  3. Step 3: Cross multiply
    9,279.99x = 12,806.91 × 5,505.39
  4. Step 4: Simplify right side
    9,279.99x = 70,507,034.24
  5. Step 5: Solve for x
    x = 70,507,034.24/9,279.99
  6. Step 6: Final answer
    x = 7,597.75

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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.