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Finding the Fourth Proportional to 18,932.28, 28,406.25 and 7,841.22

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Solution

The fourth proportional to 18,932.28, 28,406.25 and 7,841.22 is: 11,765.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,932.28 : 28,406.25 = 7,841.22 : x
  2. Step 2: Convert to fraction form
    18,932.28/28,406.25 = 7,841.22/x
  3. Step 3: Cross multiply
    18,932.28x = 28,406.25 × 7,841.22
  4. Step 4: Simplify right side
    18,932.28x = 222,739,655.63
  5. Step 5: Solve for x
    x = 222,739,655.63/18,932.28
  6. Step 6: Final answer
    x = 11,765.07

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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.