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Finding the Fourth Proportional to 19,280.88, 28,952.72 and 11,932.16

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Solution

The fourth proportional to 19,280.88, 28,952.72 and 11,932.16 is: 17,917.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,280.88 : 28,952.72 = 11,932.16 : x
  2. Step 2: Convert to fraction form
    19,280.88/28,952.72 = 11,932.16/x
  3. Step 3: Cross multiply
    19,280.88x = 28,952.72 × 11,932.16
  4. Step 4: Simplify right side
    19,280.88x = 345,468,283.05
  5. Step 5: Solve for x
    x = 345,468,283.05/19,280.88
  6. Step 6: Final answer
    x = 17,917.66

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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.