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Finding the Fourth Proportional to 18,753.36, 28,143.88 and 8,892.68

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Solution

The fourth proportional to 18,753.36, 28,143.88 and 8,892.68 is: 13,345.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,753.36 : 28,143.88 = 8,892.68 : x
  2. Step 2: Convert to fraction form
    18,753.36/28,143.88 = 8,892.68/x
  3. Step 3: Cross multiply
    18,753.36x = 28,143.88 × 8,892.68
  4. Step 4: Simplify right side
    18,753.36x = 250,274,518.80
  5. Step 5: Solve for x
    x = 250,274,518.80/18,753.36
  6. Step 6: Final answer
    x = 13,345.58

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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.