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Finding the Fourth Proportional to 10,862.70, 14,993.91 and 8,628.54

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Solution

The fourth proportional to 10,862.70, 14,993.91 and 8,628.54 is: 11,910.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,862.70 : 14,993.91 = 8,628.54 : x
  2. Step 2: Convert to fraction form
    10,862.70/14,993.91 = 8,628.54/x
  3. Step 3: Cross multiply
    10,862.70x = 14,993.91 × 8,628.54
  4. Step 4: Simplify right side
    10,862.70x = 129,375,552.19
  5. Step 5: Solve for x
    x = 129,375,552.19/10,862.70
  6. Step 6: Final answer
    x = 11,910.07

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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.