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Finding the Fourth Proportional to 18,976.59, 28,464.83 and 5,125.59

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Solution

The fourth proportional to 18,976.59, 28,464.83 and 5,125.59 is: 7,688.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,976.59 : 28,464.83 = 5,125.59 : x
  2. Step 2: Convert to fraction form
    18,976.59/28,464.83 = 5,125.59/x
  3. Step 3: Cross multiply
    18,976.59x = 28,464.83 × 5,125.59
  4. Step 4: Simplify right side
    18,976.59x = 145,899,022.37
  5. Step 5: Solve for x
    x = 145,899,022.37/18,976.59
  6. Step 6: Final answer
    x = 7,688.37

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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.