Home / 19,776.40-27,280.20-11,391.44

Finding the Fourth Proportional to 19,776.40, 27,280.20 and 11,391.44

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Solution

The fourth proportional to 19,776.40, 27,280.20 and 11,391.44 is: 15,713.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,776.40 : 27,280.20 = 11,391.44 : x
  2. Step 2: Convert to fraction form
    19,776.40/27,280.20 = 11,391.44/x
  3. Step 3: Cross multiply
    19,776.40x = 27,280.20 × 11,391.44
  4. Step 4: Simplify right side
    19,776.40x = 310,760,761.49
  5. Step 5: Solve for x
    x = 310,760,761.49/19,776.40
  6. Step 6: Final answer
    x = 15,713.72

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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.