Home / 18,858.12-28,288.55-5,711.52

Finding the Fourth Proportional to 18,858.12, 28,288.55 and 5,711.52

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Solution

The fourth proportional to 18,858.12, 28,288.55 and 5,711.52 is: 8,567.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,858.12 : 28,288.55 = 5,711.52 : x
  2. Step 2: Convert to fraction form
    18,858.12/28,288.55 = 5,711.52/x
  3. Step 3: Cross multiply
    18,858.12x = 28,288.55 × 5,711.52
  4. Step 4: Simplify right side
    18,858.12x = 161,570,619.10
  5. Step 5: Solve for x
    x = 161,570,619.10/18,858.12
  6. Step 6: Final answer
    x = 8,567.69

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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.