Home / 20,136.90-27,789.85-11,184.45

Finding the Fourth Proportional to 20,136.90, 27,789.85 and 11,184.45

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Solution

The fourth proportional to 20,136.90, 27,789.85 and 11,184.45 is: 15,435.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,136.90 : 27,789.85 = 11,184.45 : x
  2. Step 2: Convert to fraction form
    20,136.90/27,789.85 = 11,184.45/x
  3. Step 3: Cross multiply
    20,136.90x = 27,789.85 × 11,184.45
  4. Step 4: Simplify right side
    20,136.90x = 310,814,097.60
  5. Step 5: Solve for x
    x = 310,814,097.60/20,136.90
  6. Step 6: Final answer
    x = 15,435.05

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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.