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Finding the Fourth Proportional to 12,912.53, 19,353.21 and 6,669.14

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Solution

The fourth proportional to 12,912.53, 19,353.21 and 6,669.14 is: 9,995.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,912.53 : 19,353.21 = 6,669.14 : x
  2. Step 2: Convert to fraction form
    12,912.53/19,353.21 = 6,669.14/x
  3. Step 3: Cross multiply
    12,912.53x = 19,353.21 × 6,669.14
  4. Step 4: Simplify right side
    12,912.53x = 129,069,182.68
  5. Step 5: Solve for x
    x = 129,069,182.68/12,912.53
  6. Step 6: Final answer
    x = 9,995.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.