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Finding the Fourth Proportional to 20,045.17, 27,662.78 and 12,983.88

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Solution

The fourth proportional to 20,045.17, 27,662.78 and 12,983.88 is: 17,918.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,045.17 : 27,662.78 = 12,983.88 : x
  2. Step 2: Convert to fraction form
    20,045.17/27,662.78 = 12,983.88/x
  3. Step 3: Cross multiply
    20,045.17x = 27,662.78 × 12,983.88
  4. Step 4: Simplify right side
    20,045.17x = 359,170,248.45
  5. Step 5: Solve for x
    x = 359,170,248.45/20,045.17
  6. Step 6: Final answer
    x = 17,918.05

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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.