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Finding the Fourth Proportional to 8,989.06, 12,398.70 and 8,245.48

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Solution

The fourth proportional to 8,989.06, 12,398.70 and 8,245.48 is: 11,373.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,989.06 : 12,398.70 = 8,245.48 : x
  2. Step 2: Convert to fraction form
    8,989.06/12,398.70 = 8,245.48/x
  3. Step 3: Cross multiply
    8,989.06x = 12,398.70 × 8,245.48
  4. Step 4: Simplify right side
    8,989.06x = 102,233,232.88
  5. Step 5: Solve for x
    x = 102,233,232.88/8,989.06
  6. Step 6: Final answer
    x = 11,373.07

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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.