Home / 15,415.92-21,273.86-8,342.28

Finding the Fourth Proportional to 15,415.92, 21,273.86 and 8,342.28

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Solution

The fourth proportional to 15,415.92, 21,273.86 and 8,342.28 is: 11,512.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,415.92 : 21,273.86 = 8,342.28 : x
  2. Step 2: Convert to fraction form
    15,415.92/21,273.86 = 8,342.28/x
  3. Step 3: Cross multiply
    15,415.92x = 21,273.86 × 8,342.28
  4. Step 4: Simplify right side
    15,415.92x = 177,472,496.80
  5. Step 5: Solve for x
    x = 177,472,496.80/15,415.92
  6. Step 6: Final answer
    x = 11,512.29

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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.