Home / 20,379.25-28,097.04-13,196.40

Finding the Fourth Proportional to 20,379.25, 28,097.04 and 13,196.40

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Solution

The fourth proportional to 20,379.25, 28,097.04 and 13,196.40 is: 18,193.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,379.25 : 28,097.04 = 13,196.40 : x
  2. Step 2: Convert to fraction form
    20,379.25/28,097.04 = 13,196.40/x
  3. Step 3: Cross multiply
    20,379.25x = 28,097.04 × 13,196.40
  4. Step 4: Simplify right side
    20,379.25x = 370,779,778.66
  5. Step 5: Solve for x
    x = 370,779,778.66/20,379.25
  6. Step 6: Final answer
    x = 18,193.99

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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.