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Finding the Fourth Proportional to 18,862.94, 28,268.88 and 7,169.78

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Solution

The fourth proportional to 18,862.94, 28,268.88 and 7,169.78 is: 10,744.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,862.94 : 28,268.88 = 7,169.78 : x
  2. Step 2: Convert to fraction form
    18,862.94/28,268.88 = 7,169.78/x
  3. Step 3: Cross multiply
    18,862.94x = 28,268.88 × 7,169.78
  4. Step 4: Simplify right side
    18,862.94x = 202,681,650.45
  5. Step 5: Solve for x
    x = 202,681,650.45/18,862.94
  6. Step 6: Final answer
    x = 10,744.97

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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.