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Finding the Fourth Proportional to 18,386.30, 27,563.88 and 8,387.48

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Solution

The fourth proportional to 18,386.30, 27,563.88 and 8,387.48 is: 12,574.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,386.30 : 27,563.88 = 8,387.48 : x
  2. Step 2: Convert to fraction form
    18,386.30/27,563.88 = 8,387.48/x
  3. Step 3: Cross multiply
    18,386.30x = 27,563.88 × 8,387.48
  4. Step 4: Simplify right side
    18,386.30x = 231,191,492.22
  5. Step 5: Solve for x
    x = 231,191,492.22/18,386.30
  6. Step 6: Final answer
    x = 12,574.12

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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.