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Finding the Fourth Proportional to 12,040.68, 18,031.68 and 8,332.50

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Solution

The fourth proportional to 12,040.68, 18,031.68 and 8,332.50 is: 12,478.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,040.68 : 18,031.68 = 8,332.50 : x
  2. Step 2: Convert to fraction form
    12,040.68/18,031.68 = 8,332.50/x
  3. Step 3: Cross multiply
    12,040.68x = 18,031.68 × 8,332.50
  4. Step 4: Simplify right side
    12,040.68x = 150,248,973.60
  5. Step 5: Solve for x
    x = 150,248,973.60/12,040.68
  6. Step 6: Final answer
    x = 12,478.45

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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.