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Finding the Fourth Proportional to 30,693, 42,376.68 and 20,101.44

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Solution

The fourth proportional to 30,693, 42,376.68 and 20,101.44 is: 27,753.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,693 : 42,376.68 = 20,101.44 : x
  2. Step 2: Convert to fraction form
    30,693/42,376.68 = 20,101.44/x
  3. Step 3: Cross multiply
    30,693x = 42,376.68 × 20,101.44
  4. Step 4: Simplify right side
    30,693x = 851,832,290.42
  5. Step 5: Solve for x
    x = 851,832,290.42/30,693
  6. Step 6: Final answer
    x = 27,753.31

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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.