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Finding the Fourth Proportional to 12,912.21, 17,815.95 and 7,607.52

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Solution

The fourth proportional to 12,912.21, 17,815.95 and 7,607.52 is: 10,496.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,912.21 : 17,815.95 = 7,607.52 : x
  2. Step 2: Convert to fraction form
    12,912.21/17,815.95 = 7,607.52/x
  3. Step 3: Cross multiply
    12,912.21x = 17,815.95 × 7,607.52
  4. Step 4: Simplify right side
    12,912.21x = 135,535,195.94
  5. Step 5: Solve for x
    x = 135,535,195.94/12,912.21
  6. Step 6: Final answer
    x = 10,496.67

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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.