Home / 20,515.36-28,311.21-11,083.93

Finding the Fourth Proportional to 20,515.36, 28,311.21 and 11,083.93

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Solution

The fourth proportional to 20,515.36, 28,311.21 and 11,083.93 is: 15,295.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,515.36 : 28,311.21 = 11,083.93 : x
  2. Step 2: Convert to fraction form
    20,515.36/28,311.21 = 11,083.93/x
  3. Step 3: Cross multiply
    20,515.36x = 28,311.21 × 11,083.93
  4. Step 4: Simplify right side
    20,515.36x = 313,799,328.30
  5. Step 5: Solve for x
    x = 313,799,328.30/20,515.36
  6. Step 6: Final answer
    x = 15,295.83

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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.