Home / 20,724.42-28,599.30-11,292.78

Finding the Fourth Proportional to 20,724.42, 28,599.30 and 11,292.78

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Solution

The fourth proportional to 20,724.42, 28,599.30 and 11,292.78 is: 15,583.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,724.42 : 28,599.30 = 11,292.78 : x
  2. Step 2: Convert to fraction form
    20,724.42/28,599.30 = 11,292.78/x
  3. Step 3: Cross multiply
    20,724.42x = 28,599.30 × 11,292.78
  4. Step 4: Simplify right side
    20,724.42x = 322,965,603.05
  5. Step 5: Solve for x
    x = 322,965,603.05/20,724.42
  6. Step 6: Final answer
    x = 15,583.82

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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.