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Finding the Fourth Proportional to 18,712.34, 28,046.16 and 8,703.58

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Solution

The fourth proportional to 18,712.34, 28,046.16 and 8,703.58 is: 13,044.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,712.34 : 28,046.16 = 8,703.58 : x
  2. Step 2: Convert to fraction form
    18,712.34/28,046.16 = 8,703.58/x
  3. Step 3: Cross multiply
    18,712.34x = 28,046.16 × 8,703.58
  4. Step 4: Simplify right side
    18,712.34x = 244,101,997.25
  5. Step 5: Solve for x
    x = 244,101,997.25/18,712.34
  6. Step 6: Final answer
    x = 13,044.97

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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.