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Finding the Fourth Proportional to 16,779.42, 25,169.90 and 11,871

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Solution

The fourth proportional to 16,779.42, 25,169.90 and 11,871 is: 17,807.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,779.42 : 25,169.90 = 11,871 : x
  2. Step 2: Convert to fraction form
    16,779.42/25,169.90 = 11,871/x
  3. Step 3: Cross multiply
    16,779.42x = 25,169.90 × 11,871
  4. Step 4: Simplify right side
    16,779.42x = 298,791,823.55
  5. Step 5: Solve for x
    x = 298,791,823.55/16,779.42
  6. Step 6: Final answer
    x = 17,807.04

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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.