Home / 20,085.89-27,720.18-11,136.20

Finding the Fourth Proportional to 20,085.89, 27,720.18 and 11,136.20

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Solution

The fourth proportional to 20,085.89, 27,720.18 and 11,136.20 is: 15,368.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,085.89 : 27,720.18 = 11,136.20 : x
  2. Step 2: Convert to fraction form
    20,085.89/27,720.18 = 11,136.20/x
  3. Step 3: Cross multiply
    20,085.89x = 27,720.18 × 11,136.20
  4. Step 4: Simplify right side
    20,085.89x = 308,697,329.92
  5. Step 5: Solve for x
    x = 308,697,329.92/20,085.89
  6. Step 6: Final answer
    x = 15,368.87

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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.