Home / 20,138.81-27,792.26-11,186.46

Finding the Fourth Proportional to 20,138.81, 27,792.26 and 11,186.46

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Solution

The fourth proportional to 20,138.81, 27,792.26 and 11,186.46 is: 15,437.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,138.81 : 27,792.26 = 11,186.46 : x
  2. Step 2: Convert to fraction form
    20,138.81/27,792.26 = 11,186.46/x
  3. Step 3: Cross multiply
    20,138.81x = 27,792.26 × 11,186.46
  4. Step 4: Simplify right side
    20,138.81x = 310,897,004.80
  5. Step 5: Solve for x
    x = 310,897,004.80/20,138.81
  6. Step 6: Final answer
    x = 15,437.70

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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.