Home / 20,515.67-28,311.54-11,084.21

Finding the Fourth Proportional to 20,515.67, 28,311.54 and 11,084.21

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Solution

The fourth proportional to 20,515.67, 28,311.54 and 11,084.21 is: 15,296.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,515.67 : 28,311.54 = 11,084.21 : x
  2. Step 2: Convert to fraction form
    20,515.67/28,311.54 = 11,084.21/x
  3. Step 3: Cross multiply
    20,515.67x = 28,311.54 × 11,084.21
  4. Step 4: Simplify right side
    20,515.67x = 313,811,054.78
  5. Step 5: Solve for x
    x = 313,811,054.78/20,515.67
  6. Step 6: Final answer
    x = 15,296.16

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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.