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Finding the Fourth Proportional to 20,703.14, 30,980.82 and 17,939.27

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Solution

The fourth proportional to 20,703.14, 30,980.82 and 17,939.27 is: 26,844.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,703.14 : 30,980.82 = 17,939.27 : x
  2. Step 2: Convert to fraction form
    20,703.14/30,980.82 = 17,939.27/x
  3. Step 3: Cross multiply
    20,703.14x = 30,980.82 × 17,939.27
  4. Step 4: Simplify right side
    20,703.14x = 555,773,294.80
  5. Step 5: Solve for x
    x = 555,773,294.80/20,703.14
  6. Step 6: Final answer
    x = 26,844.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.