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Finding the Fourth Proportional to 15,424.58, 21,285.98 and 8,351

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Solution

The fourth proportional to 15,424.58, 21,285.98 and 8,351 is: 11,524.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,424.58 : 21,285.98 = 8,351 : x
  2. Step 2: Convert to fraction form
    15,424.58/21,285.98 = 8,351/x
  3. Step 3: Cross multiply
    15,424.58x = 21,285.98 × 8,351
  4. Step 4: Simplify right side
    15,424.58x = 177,759,218.98
  5. Step 5: Solve for x
    x = 177,759,218.98/15,424.58
  6. Step 6: Final answer
    x = 11,524.41

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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.