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Finding the Fourth Proportional to 20,205.44, 27,885.44 and 11,820.16

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Solution

The fourth proportional to 20,205.44, 27,885.44 and 11,820.16 is: 16,312.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,205.44 : 27,885.44 = 11,820.16 : x
  2. Step 2: Convert to fraction form
    20,205.44/27,885.44 = 11,820.16/x
  3. Step 3: Cross multiply
    20,205.44x = 27,885.44 × 11,820.16
  4. Step 4: Simplify right side
    20,205.44x = 329,610,362.47
  5. Step 5: Solve for x
    x = 329,610,362.47/20,205.44
  6. Step 6: Final answer
    x = 16,312.95

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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.