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Finding the Fourth Proportional to 12,390.74, 17,099.23 and 6,725.49

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Solution

The fourth proportional to 12,390.74, 17,099.23 and 6,725.49 is: 9,281.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,390.74 : 17,099.23 = 6,725.49 : x
  2. Step 2: Convert to fraction form
    12,390.74/17,099.23 = 6,725.49/x
  3. Step 3: Cross multiply
    12,390.74x = 17,099.23 × 6,725.49
  4. Step 4: Simplify right side
    12,390.74x = 115,000,700.37
  5. Step 5: Solve for x
    x = 115,000,700.37/12,390.74
  6. Step 6: Final answer
    x = 9,281.18

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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.