Home / 15,795.14-21,796.31-8,721.72

Finding the Fourth Proportional to 15,795.14, 21,796.31 and 8,721.72

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Solution

The fourth proportional to 15,795.14, 21,796.31 and 8,721.72 is: 12,035.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,795.14 : 21,796.31 = 8,721.72 : x
  2. Step 2: Convert to fraction form
    15,795.14/21,796.31 = 8,721.72/x
  3. Step 3: Cross multiply
    15,795.14x = 21,796.31 × 8,721.72
  4. Step 4: Simplify right side
    15,795.14x = 190,101,334.66
  5. Step 5: Solve for x
    x = 190,101,334.66/15,795.14
  6. Step 6: Final answer
    x = 12,035.43

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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.