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Finding the Fourth Proportional to 18,879.53, 28,308.26 and 7,773.69

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Solution

The fourth proportional to 18,879.53, 28,308.26 and 7,773.69 is: 11,655.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,879.53 : 28,308.26 = 7,773.69 : x
  2. Step 2: Convert to fraction form
    18,879.53/28,308.26 = 7,773.69/x
  3. Step 3: Cross multiply
    18,879.53x = 28,308.26 × 7,773.69
  4. Step 4: Simplify right side
    18,879.53x = 220,059,657.11
  5. Step 5: Solve for x
    x = 220,059,657.11/18,879.53
  6. Step 6: Final answer
    x = 11,655.99

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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.