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Finding the Fourth Proportional to 9,279.56, 12,806.10 and 5,087.81

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Solution

The fourth proportional to 9,279.56, 12,806.10 and 5,087.81 is: 7,021.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,279.56 : 12,806.10 = 5,087.81 : x
  2. Step 2: Convert to fraction form
    9,279.56/12,806.10 = 5,087.81/x
  3. Step 3: Cross multiply
    9,279.56x = 12,806.10 × 5,087.81
  4. Step 4: Simplify right side
    9,279.56x = 65,155,035.66
  5. Step 5: Solve for x
    x = 65,155,035.66/9,279.56
  6. Step 6: Final answer
    x = 7,021.35

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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.