Home / 15,429.56-21,292.82-8,356

Finding the Fourth Proportional to 15,429.56, 21,292.82 and 8,356

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Solution

The fourth proportional to 15,429.56, 21,292.82 and 8,356 is: 11,531.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,429.56 : 21,292.82 = 8,356 : x
  2. Step 2: Convert to fraction form
    15,429.56/21,292.82 = 8,356/x
  3. Step 3: Cross multiply
    15,429.56x = 21,292.82 × 8,356
  4. Step 4: Simplify right side
    15,429.56x = 177,922,803.92
  5. Step 5: Solve for x
    x = 177,922,803.92/15,429.56
  6. Step 6: Final answer
    x = 11,531.29

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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.