Home / 13,396.71-18,487.11-7,428.36

Finding the Fourth Proportional to 13,396.71, 18,487.11 and 7,428.36

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Solution

The fourth proportional to 13,396.71, 18,487.11 and 7,428.36 is: 10,250.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,396.71 : 18,487.11 = 7,428.36 : x
  2. Step 2: Convert to fraction form
    13,396.71/18,487.11 = 7,428.36/x
  3. Step 3: Cross multiply
    13,396.71x = 18,487.11 × 7,428.36
  4. Step 4: Simplify right side
    13,396.71x = 137,328,908.44
  5. Step 5: Solve for x
    x = 137,328,908.44/13,396.71
  6. Step 6: Final answer
    x = 10,250.94

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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.