Home / 15,724.20-21,698.82-8,650.56

Finding the Fourth Proportional to 15,724.20, 21,698.82 and 8,650.56

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Solution

The fourth proportional to 15,724.20, 21,698.82 and 8,650.56 is: 11,937.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,724.20 : 21,698.82 = 8,650.56 : x
  2. Step 2: Convert to fraction form
    15,724.20/21,698.82 = 8,650.56/x
  3. Step 3: Cross multiply
    15,724.20x = 21,698.82 × 8,650.56
  4. Step 4: Simplify right side
    15,724.20x = 187,706,944.34
  5. Step 5: Solve for x
    x = 187,706,944.34/15,724.20
  6. Step 6: Final answer
    x = 11,937.46

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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.