Home / 20,154.88-27,820.56-11,778.40

Finding the Fourth Proportional to 20,154.88, 27,820.56 and 11,778.40

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Solution

The fourth proportional to 20,154.88, 27,820.56 and 11,778.40 is: 16,258.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,154.88 : 27,820.56 = 11,778.40 : x
  2. Step 2: Convert to fraction form
    20,154.88/27,820.56 = 11,778.40/x
  3. Step 3: Cross multiply
    20,154.88x = 27,820.56 × 11,778.40
  4. Step 4: Simplify right side
    20,154.88x = 327,681,683.90
  5. Step 5: Solve for x
    x = 327,681,683.90/20,154.88
  6. Step 6: Final answer
    x = 16,258.18

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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.