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Finding the Fourth Proportional to 7,669.56, 11,489.22 and 7,129.56

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Solution

The fourth proportional to 7,669.56, 11,489.22 and 7,129.56 is: 10,680.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,669.56 : 11,489.22 = 7,129.56 : x
  2. Step 2: Convert to fraction form
    7,669.56/11,489.22 = 7,129.56/x
  3. Step 3: Cross multiply
    7,669.56x = 11,489.22 × 7,129.56
  4. Step 4: Simplify right side
    7,669.56x = 81,913,083.34
  5. Step 5: Solve for x
    x = 81,913,083.34/7,669.56
  6. Step 6: Final answer
    x = 10,680.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.