Home / 28,103.81-38,779.94-16,771.21

Finding the Fourth Proportional to 28,103.81, 38,779.94 and 16,771.21

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Solution

The fourth proportional to 28,103.81, 38,779.94 and 16,771.21 is: 23,142.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,103.81 : 38,779.94 = 16,771.21 : x
  2. Step 2: Convert to fraction form
    28,103.81/38,779.94 = 16,771.21/x
  3. Step 3: Cross multiply
    28,103.81x = 38,779.94 × 16,771.21
  4. Step 4: Simplify right side
    28,103.81x = 650,386,517.53
  5. Step 5: Solve for x
    x = 650,386,517.53/28,103.81
  6. Step 6: Final answer
    x = 23,142.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.