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Finding the Fourth Proportional to 12,390.72, 17,099.30 and 6,725.46

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Solution

The fourth proportional to 12,390.72, 17,099.30 and 6,725.46 is: 9,281.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,390.72 : 17,099.30 = 6,725.46 : x
  2. Step 2: Convert to fraction form
    12,390.72/17,099.30 = 6,725.46/x
  3. Step 3: Cross multiply
    12,390.72x = 17,099.30 × 6,725.46
  4. Step 4: Simplify right side
    12,390.72x = 115,000,658.18
  5. Step 5: Solve for x
    x = 115,000,658.18/12,390.72
  6. Step 6: Final answer
    x = 9,281.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.