Home / 20,515.61-28,311.56-11,084.18

Finding the Fourth Proportional to 20,515.61, 28,311.56 and 11,084.18

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Solution

The fourth proportional to 20,515.61, 28,311.56 and 11,084.18 is: 15,296.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,515.61 : 28,311.56 = 11,084.18 : x
  2. Step 2: Convert to fraction form
    20,515.61/28,311.56 = 11,084.18/x
  3. Step 3: Cross multiply
    20,515.61x = 28,311.56 × 11,084.18
  4. Step 4: Simplify right side
    20,515.61x = 313,810,230.14
  5. Step 5: Solve for x
    x = 313,810,230.14/20,515.61
  6. Step 6: Final answer
    x = 15,296.17

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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.