Home / 20,852.82-28,777.05-11,421.18

Finding the Fourth Proportional to 20,852.82, 28,777.05 and 11,421.18

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Solution

The fourth proportional to 20,852.82, 28,777.05 and 11,421.18 is: 15,761.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,852.82 : 28,777.05 = 11,421.18 : x
  2. Step 2: Convert to fraction form
    20,852.82/28,777.05 = 11,421.18/x
  3. Step 3: Cross multiply
    20,852.82x = 28,777.05 × 11,421.18
  4. Step 4: Simplify right side
    20,852.82x = 328,667,867.92
  5. Step 5: Solve for x
    x = 328,667,867.92/20,852.82
  6. Step 6: Final answer
    x = 15,761.32

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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.