Home / 12,940.91-19,439-9,266.75

Finding the Fourth Proportional to 12,940.91, 19,439 and 9,266.75

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Solution

The fourth proportional to 12,940.91, 19,439 and 9,266.75 is: 13,919.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,940.91 : 19,439 = 9,266.75 : x
  2. Step 2: Convert to fraction form
    12,940.91/19,439 = 9,266.75/x
  3. Step 3: Cross multiply
    12,940.91x = 19,439 × 9,266.75
  4. Step 4: Simplify right side
    12,940.91x = 180,136,353.25
  5. Step 5: Solve for x
    x = 180,136,353.25/12,940.91
  6. Step 6: Final answer
    x = 13,919.91

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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.