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Finding the Fourth Proportional to 12,582.29, 18,862.64 and 7,031.09

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Solution

The fourth proportional to 12,582.29, 18,862.64 and 7,031.09 is: 10,540.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,582.29 : 18,862.64 = 7,031.09 : x
  2. Step 2: Convert to fraction form
    12,582.29/18,862.64 = 7,031.09/x
  3. Step 3: Cross multiply
    12,582.29x = 18,862.64 × 7,031.09
  4. Step 4: Simplify right side
    12,582.29x = 132,624,957.85
  5. Step 5: Solve for x
    x = 132,624,957.85/12,582.29
  6. Step 6: Final answer
    x = 10,540.60

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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.