Home / 20,868.82-28,799.08-11,437.72

Finding the Fourth Proportional to 20,868.82, 28,799.08 and 11,437.72

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Solution

The fourth proportional to 20,868.82, 28,799.08 and 11,437.72 is: 15,784.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,868.82 : 28,799.08 = 11,437.72 : x
  2. Step 2: Convert to fraction form
    20,868.82/28,799.08 = 11,437.72/x
  3. Step 3: Cross multiply
    20,868.82x = 28,799.08 × 11,437.72
  4. Step 4: Simplify right side
    20,868.82x = 329,395,813.30
  5. Step 5: Solve for x
    x = 329,395,813.30/20,868.82
  6. Step 6: Final answer
    x = 15,784.11

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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.