Home / 12,760.20-19,140.30-11,399.40

Finding the Fourth Proportional to 12,760.20, 19,140.30 and 11,399.40

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Solution

The fourth proportional to 12,760.20, 19,140.30 and 11,399.40 is: 17,099.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,760.20 : 19,140.30 = 11,399.40 : x
  2. Step 2: Convert to fraction form
    12,760.20/19,140.30 = 11,399.40/x
  3. Step 3: Cross multiply
    12,760.20x = 19,140.30 × 11,399.40
  4. Step 4: Simplify right side
    12,760.20x = 218,187,935.82
  5. Step 5: Solve for x
    x = 218,187,935.82/12,760.20
  6. Step 6: Final answer
    x = 17,099.10

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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.