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Finding the Fourth Proportional to 8,339.58, 12,438.63 and 7,031.97

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Solution

The fourth proportional to 8,339.58, 12,438.63 and 7,031.97 is: 10,488.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,339.58 : 12,438.63 = 7,031.97 : x
  2. Step 2: Convert to fraction form
    8,339.58/12,438.63 = 7,031.97/x
  3. Step 3: Cross multiply
    8,339.58x = 12,438.63 × 7,031.97
  4. Step 4: Simplify right side
    8,339.58x = 87,468,073.00
  5. Step 5: Solve for x
    x = 87,468,073.00/8,339.58
  6. Step 6: Final answer
    x = 10,488.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.