Home / 15,415.31-21,273.13-8,341.73

Finding the Fourth Proportional to 15,415.31, 21,273.13 and 8,341.73

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Solution

The fourth proportional to 15,415.31, 21,273.13 and 8,341.73 is: 11,511.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,415.31 : 21,273.13 = 8,341.73 : x
  2. Step 2: Convert to fraction form
    15,415.31/21,273.13 = 8,341.73/x
  3. Step 3: Cross multiply
    15,415.31x = 21,273.13 × 8,341.73
  4. Step 4: Simplify right side
    15,415.31x = 177,454,810.21
  5. Step 5: Solve for x
    x = 177,454,810.21/15,415.31
  6. Step 6: Final answer
    x = 11,511.59

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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.