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Finding the Fourth Proportional to 18,636.76, 27,955.35 and 5,489.38

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Solution

The fourth proportional to 18,636.76, 27,955.35 and 5,489.38 is: 8,234.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,636.76 : 27,955.35 = 5,489.38 : x
  2. Step 2: Convert to fraction form
    18,636.76/27,955.35 = 5,489.38/x
  3. Step 3: Cross multiply
    18,636.76x = 27,955.35 × 5,489.38
  4. Step 4: Simplify right side
    18,636.76x = 153,457,539.18
  5. Step 5: Solve for x
    x = 153,457,539.18/18,636.76
  6. Step 6: Final answer
    x = 8,234.13

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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.