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Finding the Fourth Proportional to 18,643.08, 27,964.56 and 5,495.40

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Solution

The fourth proportional to 18,643.08, 27,964.56 and 5,495.40 is: 8,243.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,643.08 : 27,964.56 = 5,495.40 : x
  2. Step 2: Convert to fraction form
    18,643.08/27,964.56 = 5,495.40/x
  3. Step 3: Cross multiply
    18,643.08x = 27,964.56 × 5,495.40
  4. Step 4: Simplify right side
    18,643.08x = 153,676,443.02
  5. Step 5: Solve for x
    x = 153,676,443.02/18,643.08
  6. Step 6: Final answer
    x = 8,243.08

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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.