Home / 20,139.93-27,792.68-11,187.27

Finding the Fourth Proportional to 20,139.93, 27,792.68 and 11,187.27

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Solution

The fourth proportional to 20,139.93, 27,792.68 and 11,187.27 is: 15,438.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,139.93 : 27,792.68 = 11,187.27 : x
  2. Step 2: Convert to fraction form
    20,139.93/27,792.68 = 11,187.27/x
  3. Step 3: Cross multiply
    20,139.93x = 27,792.68 × 11,187.27
  4. Step 4: Simplify right side
    20,139.93x = 310,924,159.25
  5. Step 5: Solve for x
    x = 310,924,159.25/20,139.93
  6. Step 6: Final answer
    x = 15,438.19

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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.