Home / 12,912.40-19,365.90-6,343.30

Finding the Fourth Proportional to 12,912.40, 19,365.90 and 6,343.30

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Solution

The fourth proportional to 12,912.40, 19,365.90 and 6,343.30 is: 9,513.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,912.40 : 19,365.90 = 6,343.30 : x
  2. Step 2: Convert to fraction form
    12,912.40/19,365.90 = 6,343.30/x
  3. Step 3: Cross multiply
    12,912.40x = 19,365.90 × 6,343.30
  4. Step 4: Simplify right side
    12,912.40x = 122,843,713.47
  5. Step 5: Solve for x
    x = 122,843,713.47/12,912.40
  6. Step 6: Final answer
    x = 9,513.62

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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.