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Finding the Fourth Proportional to 18,905.93, 28,375.29 and 18,862.19

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Solution

The fourth proportional to 18,905.93, 28,375.29 and 18,862.19 is: 28,309.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,905.93 : 28,375.29 = 18,862.19 : x
  2. Step 2: Convert to fraction form
    18,905.93/28,375.29 = 18,862.19/x
  3. Step 3: Cross multiply
    18,905.93x = 28,375.29 × 18,862.19
  4. Step 4: Simplify right side
    18,905.93x = 535,220,016.97
  5. Step 5: Solve for x
    x = 535,220,016.97/18,905.93
  6. Step 6: Final answer
    x = 28,309.64

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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.