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Finding the Fourth Proportional to 18,910.91, 28,383.88 and 9,557.54

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Solution

The fourth proportional to 18,910.91, 28,383.88 and 9,557.54 is: 14,345.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,910.91 : 28,383.88 = 9,557.54 : x
  2. Step 2: Convert to fraction form
    18,910.91/28,383.88 = 9,557.54/x
  3. Step 3: Cross multiply
    18,910.91x = 28,383.88 × 9,557.54
  4. Step 4: Simplify right side
    18,910.91x = 271,280,068.46
  5. Step 5: Solve for x
    x = 271,280,068.46/18,910.91
  6. Step 6: Final answer
    x = 14,345.16

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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.