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Finding the Fourth Proportional to 18,795.85, 28,155.47 and 8,905.14

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Solution

The fourth proportional to 18,795.85, 28,155.47 and 8,905.14 is: 13,339.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,795.85 : 28,155.47 = 8,905.14 : x
  2. Step 2: Convert to fraction form
    18,795.85/28,155.47 = 8,905.14/x
  3. Step 3: Cross multiply
    18,795.85x = 28,155.47 × 8,905.14
  4. Step 4: Simplify right side
    18,795.85x = 250,728,357.59
  5. Step 5: Solve for x
    x = 250,728,357.59/18,795.85
  6. Step 6: Final answer
    x = 13,339.56

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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.