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Finding the Fourth Proportional to 18,693.99, 28,016.15 and 10,369.62

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Solution

The fourth proportional to 18,693.99, 28,016.15 and 10,369.62 is: 15,540.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,693.99 : 28,016.15 = 10,369.62 : x
  2. Step 2: Convert to fraction form
    18,693.99/28,016.15 = 10,369.62/x
  3. Step 3: Cross multiply
    18,693.99x = 28,016.15 × 10,369.62
  4. Step 4: Simplify right side
    18,693.99x = 290,516,777.51
  5. Step 5: Solve for x
    x = 290,516,777.51/18,693.99
  6. Step 6: Final answer
    x = 15,540.65

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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.