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Finding the Fourth Proportional to 18,643.40, 27,965.04 and 5,495.74

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Solution

The fourth proportional to 18,643.40, 27,965.04 and 5,495.74 is: 8,243.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,643.40 : 27,965.04 = 5,495.74 : x
  2. Step 2: Convert to fraction form
    18,643.40/27,965.04 = 5,495.74/x
  3. Step 3: Cross multiply
    18,643.40x = 27,965.04 × 5,495.74
  4. Step 4: Simplify right side
    18,643.40x = 153,688,588.93
  5. Step 5: Solve for x
    x = 153,688,588.93/18,643.40
  6. Step 6: Final answer
    x = 8,243.59

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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.