Home / 28,691.67-39,577.64-20,206.11

Finding the Fourth Proportional to 28,691.67, 39,577.64 and 20,206.11

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Solution

The fourth proportional to 28,691.67, 39,577.64 and 20,206.11 is: 27,872.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,691.67 : 39,577.64 = 20,206.11 : x
  2. Step 2: Convert to fraction form
    28,691.67/39,577.64 = 20,206.11/x
  3. Step 3: Cross multiply
    28,691.67x = 39,577.64 × 20,206.11
  4. Step 4: Simplify right side
    28,691.67x = 799,710,046.35
  5. Step 5: Solve for x
    x = 799,710,046.35/28,691.67
  6. Step 6: Final answer
    x = 27,872.55

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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.