Home / 15,712.56-21,682.41-8,638.98

Finding the Fourth Proportional to 15,712.56, 21,682.41 and 8,638.98

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Solution

The fourth proportional to 15,712.56, 21,682.41 and 8,638.98 is: 11,921.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,712.56 : 21,682.41 = 8,638.98 : x
  2. Step 2: Convert to fraction form
    15,712.56/21,682.41 = 8,638.98/x
  3. Step 3: Cross multiply
    15,712.56x = 21,682.41 × 8,638.98
  4. Step 4: Simplify right side
    15,712.56x = 187,313,906.34
  5. Step 5: Solve for x
    x = 187,313,906.34/15,712.56
  6. Step 6: Final answer
    x = 11,921.29

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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.