Home / 15,682.12-21,669.36-11,665.15

Finding the Fourth Proportional to 15,682.12, 21,669.36 and 11,665.15

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Solution

The fourth proportional to 15,682.12, 21,669.36 and 11,665.15 is: 16,118.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,682.12 : 21,669.36 = 11,665.15 : x
  2. Step 2: Convert to fraction form
    15,682.12/21,669.36 = 11,665.15/x
  3. Step 3: Cross multiply
    15,682.12x = 21,669.36 × 11,665.15
  4. Step 4: Simplify right side
    15,682.12x = 252,776,334.80
  5. Step 5: Solve for x
    x = 252,776,334.80/15,682.12
  6. Step 6: Final answer
    x = 16,118.76

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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.