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Finding the Fourth Proportional to 18,940.34, 28,418.71 and 10,165.01

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Solution

The fourth proportional to 18,940.34, 28,418.71 and 10,165.01 is: 15,251.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,940.34 : 28,418.71 = 10,165.01 : x
  2. Step 2: Convert to fraction form
    18,940.34/28,418.71 = 10,165.01/x
  3. Step 3: Cross multiply
    18,940.34x = 28,418.71 × 10,165.01
  4. Step 4: Simplify right side
    18,940.34x = 288,876,303.83
  5. Step 5: Solve for x
    x = 288,876,303.83/18,940.34
  6. Step 6: Final answer
    x = 15,251.90

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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.