Home / 15,429.97-21,293.32-8,356.45

Finding the Fourth Proportional to 15,429.97, 21,293.32 and 8,356.45

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Solution

The fourth proportional to 15,429.97, 21,293.32 and 8,356.45 is: 11,531.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,429.97 : 21,293.32 = 8,356.45 : x
  2. Step 2: Convert to fraction form
    15,429.97/21,293.32 = 8,356.45/x
  3. Step 3: Cross multiply
    15,429.97x = 21,293.32 × 8,356.45
  4. Step 4: Simplify right side
    15,429.97x = 177,936,563.91
  5. Step 5: Solve for x
    x = 177,936,563.91/15,429.97
  6. Step 6: Final answer
    x = 11,531.88

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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.