Home / 20,557.33-28,369.12-11,125.90

Finding the Fourth Proportional to 20,557.33, 28,369.12 and 11,125.90

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Solution

The fourth proportional to 20,557.33, 28,369.12 and 11,125.90 is: 15,353.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,557.33 : 28,369.12 = 11,125.90 : x
  2. Step 2: Convert to fraction form
    20,557.33/28,369.12 = 11,125.90/x
  3. Step 3: Cross multiply
    20,557.33x = 28,369.12 × 11,125.90
  4. Step 4: Simplify right side
    20,557.33x = 315,631,992.21
  5. Step 5: Solve for x
    x = 315,631,992.21/20,557.33
  6. Step 6: Final answer
    x = 15,353.74

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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.