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Finding the Fourth Proportional to 12,661.54, 18,990.54 and 4,341.42

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Solution

The fourth proportional to 12,661.54, 18,990.54 and 4,341.42 is: 6,511.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,661.54 : 18,990.54 = 4,341.42 : x
  2. Step 2: Convert to fraction form
    12,661.54/18,990.54 = 4,341.42/x
  3. Step 3: Cross multiply
    12,661.54x = 18,990.54 × 4,341.42
  4. Step 4: Simplify right side
    12,661.54x = 82,445,910.17
  5. Step 5: Solve for x
    x = 82,445,910.17/12,661.54
  6. Step 6: Final answer
    x = 6,511.52

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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.