Home / 20,085.99-27,715.41-12,531.12

Finding the Fourth Proportional to 20,085.99, 27,715.41 and 12,531.12

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Solution

The fourth proportional to 20,085.99, 27,715.41 and 12,531.12 is: 17,290.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,085.99 : 27,715.41 = 12,531.12 : x
  2. Step 2: Convert to fraction form
    20,085.99/27,715.41 = 12,531.12/x
  3. Step 3: Cross multiply
    20,085.99x = 27,715.41 × 12,531.12
  4. Step 4: Simplify right side
    20,085.99x = 347,305,128.56
  5. Step 5: Solve for x
    x = 347,305,128.56/20,085.99
  6. Step 6: Final answer
    x = 17,290.91

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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.