Home / 20,108.64-27,750.15-11,156.40

Finding the Fourth Proportional to 20,108.64, 27,750.15 and 11,156.40

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Solution

The fourth proportional to 20,108.64, 27,750.15 and 11,156.40 is: 15,395.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,108.64 : 27,750.15 = 11,156.40 : x
  2. Step 2: Convert to fraction form
    20,108.64/27,750.15 = 11,156.40/x
  3. Step 3: Cross multiply
    20,108.64x = 27,750.15 × 11,156.40
  4. Step 4: Simplify right side
    20,108.64x = 309,591,773.46
  5. Step 5: Solve for x
    x = 309,591,773.46/20,108.64
  6. Step 6: Final answer
    x = 15,395.96

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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.