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Finding the Fourth Proportional to 18,903.78, 28,359.32 and 10,593.18

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Solution

The fourth proportional to 18,903.78, 28,359.32 and 10,593.18 is: 15,891.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,903.78 : 28,359.32 = 10,593.18 : x
  2. Step 2: Convert to fraction form
    18,903.78/28,359.32 = 10,593.18/x
  3. Step 3: Cross multiply
    18,903.78x = 28,359.32 × 10,593.18
  4. Step 4: Simplify right side
    18,903.78x = 300,415,328.47
  5. Step 5: Solve for x
    x = 300,415,328.47/18,903.78
  6. Step 6: Final answer
    x = 15,891.81

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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.