Home / 20,085.90-27,720.18-11,136.21

Finding the Fourth Proportional to 20,085.90, 27,720.18 and 11,136.21

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Solution

The fourth proportional to 20,085.90, 27,720.18 and 11,136.21 is: 15,368.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,085.90 : 27,720.18 = 11,136.21 : x
  2. Step 2: Convert to fraction form
    20,085.90/27,720.18 = 11,136.21/x
  3. Step 3: Cross multiply
    20,085.90x = 27,720.18 × 11,136.21
  4. Step 4: Simplify right side
    20,085.90x = 308,697,745.72
  5. Step 5: Solve for x
    x = 308,697,745.72/20,085.90
  6. Step 6: Final answer
    x = 15,368.88

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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.