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Finding the Fourth Proportional to 18,031.32, 27,050.64 and 7,643.04

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Solution

The fourth proportional to 18,031.32, 27,050.64 and 7,643.04 is: 11,466.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,031.32 : 27,050.64 = 7,643.04 : x
  2. Step 2: Convert to fraction form
    18,031.32/27,050.64 = 7,643.04/x
  3. Step 3: Cross multiply
    18,031.32x = 27,050.64 × 7,643.04
  4. Step 4: Simplify right side
    18,031.32x = 206,749,123.55
  5. Step 5: Solve for x
    x = 206,749,123.55/18,031.32
  6. Step 6: Final answer
    x = 11,466.11

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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.