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Finding the Fourth Proportional to 18,724.20, 28,110.60 and 15,030.60

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Solution

The fourth proportional to 18,724.20, 28,110.60 and 15,030.60 is: 22,565.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,724.20 : 28,110.60 = 15,030.60 : x
  2. Step 2: Convert to fraction form
    18,724.20/28,110.60 = 15,030.60/x
  3. Step 3: Cross multiply
    18,724.20x = 28,110.60 × 15,030.60
  4. Step 4: Simplify right side
    18,724.20x = 422,519,184.36
  5. Step 5: Solve for x
    x = 422,519,184.36/18,724.20
  6. Step 6: Final answer
    x = 22,565.41

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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.