Home / 15,795.28-21,796.90-8,721.55

Finding the Fourth Proportional to 15,795.28, 21,796.90 and 8,721.55

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Solution

The fourth proportional to 15,795.28, 21,796.90 and 8,721.55 is: 12,035.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,795.28 : 21,796.90 = 8,721.55 : x
  2. Step 2: Convert to fraction form
    15,795.28/21,796.90 = 8,721.55/x
  3. Step 3: Cross multiply
    15,795.28x = 21,796.90 × 8,721.55
  4. Step 4: Simplify right side
    15,795.28x = 190,102,753.20
  5. Step 5: Solve for x
    x = 190,102,753.20/15,795.28
  6. Step 6: Final answer
    x = 12,035.42

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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.