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Finding the Fourth Proportional to 28,010, 38,654.28 and 18,091.28

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Solution

The fourth proportional to 28,010, 38,654.28 and 18,091.28 is: 24,966.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,010 : 38,654.28 = 18,091.28 : x
  2. Step 2: Convert to fraction form
    28,010/38,654.28 = 18,091.28/x
  3. Step 3: Cross multiply
    28,010x = 38,654.28 × 18,091.28
  4. Step 4: Simplify right side
    28,010x = 699,305,402.68
  5. Step 5: Solve for x
    x = 699,305,402.68/28,010
  6. Step 6: Final answer
    x = 24,966.28

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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.