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Finding the Fourth Proportional to 18,873.69, 28,313.94 and 7,774.32

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Solution

The fourth proportional to 18,873.69, 28,313.94 and 7,774.32 is: 11,662.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,873.69 : 28,313.94 = 7,774.32 : x
  2. Step 2: Convert to fraction form
    18,873.69/28,313.94 = 7,774.32/x
  3. Step 3: Cross multiply
    18,873.69x = 28,313.94 × 7,774.32
  4. Step 4: Simplify right side
    18,873.69x = 220,121,630.02
  5. Step 5: Solve for x
    x = 220,121,630.02/18,873.69
  6. Step 6: Final answer
    x = 11,662.88

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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.