Home / 20,085.16-27,720.90-11,706.28

Finding the Fourth Proportional to 20,085.16, 27,720.90 and 11,706.28

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Solution

The fourth proportional to 20,085.16, 27,720.90 and 11,706.28 is: 16,156.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,085.16 : 27,720.90 = 11,706.28 : x
  2. Step 2: Convert to fraction form
    20,085.16/27,720.90 = 11,706.28/x
  3. Step 3: Cross multiply
    20,085.16x = 27,720.90 × 11,706.28
  4. Step 4: Simplify right side
    20,085.16x = 324,508,617.25
  5. Step 5: Solve for x
    x = 324,508,617.25/20,085.16
  6. Step 6: Final answer
    x = 16,156.64

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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.