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Finding the Fourth Proportional to 20,264.40, 27,965.40 and 11,311.86

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Solution

The fourth proportional to 20,264.40, 27,965.40 and 11,311.86 is: 15,610.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,264.40 : 27,965.40 = 11,311.86 : x
  2. Step 2: Convert to fraction form
    20,264.40/27,965.40 = 11,311.86/x
  3. Step 3: Cross multiply
    20,264.40x = 27,965.40 × 11,311.86
  4. Step 4: Simplify right side
    20,264.40x = 316,340,689.64
  5. Step 5: Solve for x
    x = 316,340,689.64/20,264.40
  6. Step 6: Final answer
    x = 15,610.66

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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.