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Finding the Fourth Proportional to 18,779.19, 28,176.69 and 8,243.78

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Solution

The fourth proportional to 18,779.19, 28,176.69 and 8,243.78 is: 12,369.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,779.19 : 28,176.69 = 8,243.78 : x
  2. Step 2: Convert to fraction form
    18,779.19/28,176.69 = 8,243.78/x
  3. Step 3: Cross multiply
    18,779.19x = 28,176.69 × 8,243.78
  4. Step 4: Simplify right side
    18,779.19x = 232,282,253.96
  5. Step 5: Solve for x
    x = 232,282,253.96/18,779.19
  6. Step 6: Final answer
    x = 12,369.13

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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.