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Finding the Fourth Proportional to 18,973.78, 28,446.59 and 9,103.66

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Solution

The fourth proportional to 18,973.78, 28,446.59 and 9,103.66 is: 13,648.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,973.78 : 28,446.59 = 9,103.66 : x
  2. Step 2: Convert to fraction form
    18,973.78/28,446.59 = 9,103.66/x
  3. Step 3: Cross multiply
    18,973.78x = 28,446.59 × 9,103.66
  4. Step 4: Simplify right side
    18,973.78x = 258,968,035.16
  5. Step 5: Solve for x
    x = 258,968,035.16/18,973.78
  6. Step 6: Final answer
    x = 13,648.73

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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.