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Finding the Fourth Proportional to 19,040.40, 28,517.40 and 11,264.40

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Solution

The fourth proportional to 19,040.40, 28,517.40 and 11,264.40 is: 16,871.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,040.40 : 28,517.40 = 11,264.40 : x
  2. Step 2: Convert to fraction form
    19,040.40/28,517.40 = 11,264.40/x
  3. Step 3: Cross multiply
    19,040.40x = 28,517.40 × 11,264.40
  4. Step 4: Simplify right side
    19,040.40x = 321,231,400.56
  5. Step 5: Solve for x
    x = 321,231,400.56/19,040.40
  6. Step 6: Final answer
    x = 16,871.04

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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.