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Finding the Fourth Proportional to 18,236.61, 27,354.91 and 4,385.61

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Solution

The fourth proportional to 18,236.61, 27,354.91 and 4,385.61 is: 6,578.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,236.61 : 27,354.91 = 4,385.61 : x
  2. Step 2: Convert to fraction form
    18,236.61/27,354.91 = 4,385.61/x
  3. Step 3: Cross multiply
    18,236.61x = 27,354.91 × 4,385.61
  4. Step 4: Simplify right side
    18,236.61x = 119,967,966.85
  5. Step 5: Solve for x
    x = 119,967,966.85/18,236.61
  6. Step 6: Final answer
    x = 6,578.41

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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.