Home / 20,261.81-27,961.20-11,308.78

Finding the Fourth Proportional to 20,261.81, 27,961.20 and 11,308.78

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Solution

The fourth proportional to 20,261.81, 27,961.20 and 11,308.78 is: 15,606.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,261.81 : 27,961.20 = 11,308.78 : x
  2. Step 2: Convert to fraction form
    20,261.81/27,961.20 = 11,308.78/x
  3. Step 3: Cross multiply
    20,261.81x = 27,961.20 × 11,308.78
  4. Step 4: Simplify right side
    20,261.81x = 316,207,094.29
  5. Step 5: Solve for x
    x = 316,207,094.29/20,261.81
  6. Step 6: Final answer
    x = 15,606.06

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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.