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Finding the Fourth Proportional to 15,424.70, 21,285.99 and 8,350.97

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Solution

The fourth proportional to 15,424.70, 21,285.99 and 8,350.97 is: 11,524.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,424.70 : 21,285.99 = 8,350.97 : x
  2. Step 2: Convert to fraction form
    15,424.70/21,285.99 = 8,350.97/x
  3. Step 3: Cross multiply
    15,424.70x = 21,285.99 × 8,350.97
  4. Step 4: Simplify right side
    15,424.70x = 177,758,557.48
  5. Step 5: Solve for x
    x = 177,758,557.48/15,424.70
  6. Step 6: Final answer
    x = 11,524.28

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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.