Home / 20,584.53-28,406.69-11,153.09

Finding the Fourth Proportional to 20,584.53, 28,406.69 and 11,153.09

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Solution

The fourth proportional to 20,584.53, 28,406.69 and 11,153.09 is: 15,391.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,584.53 : 28,406.69 = 11,153.09 : x
  2. Step 2: Convert to fraction form
    20,584.53/28,406.69 = 11,153.09/x
  3. Step 3: Cross multiply
    20,584.53x = 28,406.69 × 11,153.09
  4. Step 4: Simplify right side
    20,584.53x = 316,822,427.25
  5. Step 5: Solve for x
    x = 316,822,427.25/20,584.53
  6. Step 6: Final answer
    x = 15,391.29

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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.