Home / 20,090.76-27,724.46-11,138.40

Finding the Fourth Proportional to 20,090.76, 27,724.46 and 11,138.40

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Solution

The fourth proportional to 20,090.76, 27,724.46 and 11,138.40 is: 15,370.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,090.76 : 27,724.46 = 11,138.40 : x
  2. Step 2: Convert to fraction form
    20,090.76/27,724.46 = 11,138.40/x
  3. Step 3: Cross multiply
    20,090.76x = 27,724.46 × 11,138.40
  4. Step 4: Simplify right side
    20,090.76x = 308,806,125.26
  5. Step 5: Solve for x
    x = 308,806,125.26/20,090.76
  6. Step 6: Final answer
    x = 15,370.55

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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.