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Finding the Fourth Proportional to 18,754.80, 28,128.38 and 6,904.52

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Solution

The fourth proportional to 18,754.80, 28,128.38 and 6,904.52 is: 10,355.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,754.80 : 28,128.38 = 6,904.52 : x
  2. Step 2: Convert to fraction form
    18,754.80/28,128.38 = 6,904.52/x
  3. Step 3: Cross multiply
    18,754.80x = 28,128.38 × 6,904.52
  4. Step 4: Simplify right side
    18,754.80x = 194,212,962.28
  5. Step 5: Solve for x
    x = 194,212,962.28/18,754.80
  6. Step 6: Final answer
    x = 10,355.37

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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.