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Finding the Fourth Proportional to 13,626.81, 18,804.87 and 7,658.46

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Solution

The fourth proportional to 13,626.81, 18,804.87 and 7,658.46 is: 10,568.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,626.81 : 18,804.87 = 7,658.46 : x
  2. Step 2: Convert to fraction form
    13,626.81/18,804.87 = 7,658.46/x
  3. Step 3: Cross multiply
    13,626.81x = 18,804.87 × 7,658.46
  4. Step 4: Simplify right side
    13,626.81x = 144,016,344.70
  5. Step 5: Solve for x
    x = 144,016,344.70/13,626.81
  6. Step 6: Final answer
    x = 10,568.60

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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.