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Finding the Fourth Proportional to 18,782.58, 28,171.70 and 4,932.66

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Solution

The fourth proportional to 18,782.58, 28,171.70 and 4,932.66 is: 7,398.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,782.58 : 28,171.70 = 4,932.66 : x
  2. Step 2: Convert to fraction form
    18,782.58/28,171.70 = 4,932.66/x
  3. Step 3: Cross multiply
    18,782.58x = 28,171.70 × 4,932.66
  4. Step 4: Simplify right side
    18,782.58x = 138,961,417.72
  5. Step 5: Solve for x
    x = 138,961,417.72/18,782.58
  6. Step 6: Final answer
    x = 7,398.42

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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.