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Finding the Fourth Proportional to 18,884.76, 28,316.22 and 7,778.88

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Solution

The fourth proportional to 18,884.76, 28,316.22 and 7,778.88 is: 11,663.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,884.76 : 28,316.22 = 7,778.88 : x
  2. Step 2: Convert to fraction form
    18,884.76/28,316.22 = 7,778.88/x
  3. Step 3: Cross multiply
    18,884.76x = 28,316.22 × 7,778.88
  4. Step 4: Simplify right side
    18,884.76x = 220,268,477.43
  5. Step 5: Solve for x
    x = 220,268,477.43/18,884.76
  6. Step 6: Final answer
    x = 11,663.82

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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.