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Finding the Fourth Proportional to 8,969.39, 12,378.16 and 7,474.81

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Solution

The fourth proportional to 8,969.39, 12,378.16 and 7,474.81 is: 10,315.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,969.39 : 12,378.16 = 7,474.81 : x
  2. Step 2: Convert to fraction form
    8,969.39/12,378.16 = 7,474.81/x
  3. Step 3: Cross multiply
    8,969.39x = 12,378.16 × 7,474.81
  4. Step 4: Simplify right side
    8,969.39x = 92,524,394.15
  5. Step 5: Solve for x
    x = 92,524,394.15/8,969.39
  6. Step 6: Final answer
    x = 10,315.57

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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.