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Finding the Fourth Proportional to 12,393.34, 17,099.79 and 7,015.90

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Solution

The fourth proportional to 12,393.34, 17,099.79 and 7,015.90 is: 9,680.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,393.34 : 17,099.79 = 7,015.90 : x
  2. Step 2: Convert to fraction form
    12,393.34/17,099.79 = 7,015.90/x
  3. Step 3: Cross multiply
    12,393.34x = 17,099.79 × 7,015.90
  4. Step 4: Simplify right side
    12,393.34x = 119,970,416.66
  5. Step 5: Solve for x
    x = 119,970,416.66/12,393.34
  6. Step 6: Final answer
    x = 9,680.23

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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.