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Finding the Fourth Proportional to 12,412.64, 17,129.54 and 6,747.50

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Solution

The fourth proportional to 12,412.64, 17,129.54 and 6,747.50 is: 9,311.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,412.64 : 17,129.54 = 6,747.50 : x
  2. Step 2: Convert to fraction form
    12,412.64/17,129.54 = 6,747.50/x
  3. Step 3: Cross multiply
    12,412.64x = 17,129.54 × 6,747.50
  4. Step 4: Simplify right side
    12,412.64x = 115,581,630.84
  5. Step 5: Solve for x
    x = 115,581,630.84/12,412.64
  6. Step 6: Final answer
    x = 9,311.61

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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.