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Finding the Fourth Proportional to 18,779.16, 28,168.77 and 5,631.54

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Solution

The fourth proportional to 18,779.16, 28,168.77 and 5,631.54 is: 8,447.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,779.16 : 28,168.77 = 5,631.54 : x
  2. Step 2: Convert to fraction form
    18,779.16/28,168.77 = 5,631.54/x
  3. Step 3: Cross multiply
    18,779.16x = 28,168.77 × 5,631.54
  4. Step 4: Simplify right side
    18,779.16x = 158,633,555.01
  5. Step 5: Solve for x
    x = 158,633,555.01/18,779.16
  6. Step 6: Final answer
    x = 8,447.32

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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.