Home / 20,557.38-28,369.19-11,125.95

Finding the Fourth Proportional to 20,557.38, 28,369.19 and 11,125.95

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Solution

The fourth proportional to 20,557.38, 28,369.19 and 11,125.95 is: 15,353.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,557.38 : 28,369.19 = 11,125.95 : x
  2. Step 2: Convert to fraction form
    20,557.38/28,369.19 = 11,125.95/x
  3. Step 3: Cross multiply
    20,557.38x = 28,369.19 × 11,125.95
  4. Step 4: Simplify right side
    20,557.38x = 315,634,133.85
  5. Step 5: Solve for x
    x = 315,634,133.85/20,557.38
  6. Step 6: Final answer
    x = 15,353.81

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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.