Home / 20,804.38-28,722.75-13,543.36

Finding the Fourth Proportional to 20,804.38, 28,722.75 and 13,543.36

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Solution

The fourth proportional to 20,804.38, 28,722.75 and 13,543.36 is: 18,698.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,804.38 : 28,722.75 = 13,543.36 : x
  2. Step 2: Convert to fraction form
    20,804.38/28,722.75 = 13,543.36/x
  3. Step 3: Cross multiply
    20,804.38x = 28,722.75 × 13,543.36
  4. Step 4: Simplify right side
    20,804.38x = 389,002,543.44
  5. Step 5: Solve for x
    x = 389,002,543.44/20,804.38
  6. Step 6: Final answer
    x = 18,698.11

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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.