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Finding the Fourth Proportional to 18,779.92, 28,169.89 and 5,632.31

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Solution

The fourth proportional to 18,779.92, 28,169.89 and 5,632.31 is: 8,448.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,779.92 : 28,169.89 = 5,632.31 : x
  2. Step 2: Convert to fraction form
    18,779.92/28,169.89 = 5,632.31/x
  3. Step 3: Cross multiply
    18,779.92x = 28,169.89 × 5,632.31
  4. Step 4: Simplify right side
    18,779.92x = 158,661,609.49
  5. Step 5: Solve for x
    x = 158,661,609.49/18,779.92
  6. Step 6: Final answer
    x = 8,448.47

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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.