Home / 15,727.79-21,704.15-11,712.58

Finding the Fourth Proportional to 15,727.79, 21,704.15 and 11,712.58

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Solution

The fourth proportional to 15,727.79, 21,704.15 and 11,712.58 is: 16,163.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,727.79 : 21,704.15 = 11,712.58 : x
  2. Step 2: Convert to fraction form
    15,727.79/21,704.15 = 11,712.58/x
  3. Step 3: Cross multiply
    15,727.79x = 21,704.15 × 11,712.58
  4. Step 4: Simplify right side
    15,727.79x = 254,211,593.21
  5. Step 5: Solve for x
    x = 254,211,593.21/15,727.79
  6. Step 6: Final answer
    x = 16,163.21

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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.