Home / 20,852.25-28,776.11-11,421.15

Finding the Fourth Proportional to 20,852.25, 28,776.11 and 11,421.15

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Solution

The fourth proportional to 20,852.25, 28,776.11 and 11,421.15 is: 15,761.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,852.25 : 28,776.11 = 11,421.15 : x
  2. Step 2: Convert to fraction form
    20,852.25/28,776.11 = 11,421.15/x
  3. Step 3: Cross multiply
    20,852.25x = 28,776.11 × 11,421.15
  4. Step 4: Simplify right side
    20,852.25x = 328,656,268.73
  5. Step 5: Solve for x
    x = 328,656,268.73/20,852.25
  6. Step 6: Final answer
    x = 15,761.19

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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.