Home / 20,518.12-30,781.32-6,480.33

Finding the Fourth Proportional to 20,518.12, 30,781.32 and 6,480.33

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Solution

The fourth proportional to 20,518.12, 30,781.32 and 6,480.33 is: 9,721.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,518.12 : 30,781.32 = 6,480.33 : x
  2. Step 2: Convert to fraction form
    20,518.12/30,781.32 = 6,480.33/x
  3. Step 3: Cross multiply
    20,518.12x = 30,781.32 × 6,480.33
  4. Step 4: Simplify right side
    20,518.12x = 199,473,111.44
  5. Step 5: Solve for x
    x = 199,473,111.44/20,518.12
  6. Step 6: Final answer
    x = 9,721.80

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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.