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Finding the Fourth Proportional to 11,228.70, 15,489.06 and 7,029.66

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Solution

The fourth proportional to 11,228.70, 15,489.06 and 7,029.66 is: 9,696.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,228.70 : 15,489.06 = 7,029.66 : x
  2. Step 2: Convert to fraction form
    11,228.70/15,489.06 = 7,029.66/x
  3. Step 3: Cross multiply
    11,228.70x = 15,489.06 × 7,029.66
  4. Step 4: Simplify right side
    11,228.70x = 108,882,825.52
  5. Step 5: Solve for x
    x = 108,882,825.52/11,228.70
  6. Step 6: Final answer
    x = 9,696.83

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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.