Home / 15,781.11-21,777.88-8,707.54

Finding the Fourth Proportional to 15,781.11, 21,777.88 and 8,707.54

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Solution

The fourth proportional to 15,781.11, 21,777.88 and 8,707.54 is: 12,016.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,781.11 : 21,777.88 = 8,707.54 : x
  2. Step 2: Convert to fraction form
    15,781.11/21,777.88 = 8,707.54/x
  3. Step 3: Cross multiply
    15,781.11x = 21,777.88 × 8,707.54
  4. Step 4: Simplify right side
    15,781.11x = 189,631,761.22
  5. Step 5: Solve for x
    x = 189,631,761.22/15,781.11
  6. Step 6: Final answer
    x = 12,016.38

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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.