Home / 21,272.32-31,747.68-20,719.36

Finding the Fourth Proportional to 21,272.32, 31,747.68 and 20,719.36

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Solution

The fourth proportional to 21,272.32, 31,747.68 and 20,719.36 is: 30,922.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,272.32 : 31,747.68 = 20,719.36 : x
  2. Step 2: Convert to fraction form
    21,272.32/31,747.68 = 20,719.36/x
  3. Step 3: Cross multiply
    21,272.32x = 31,747.68 × 20,719.36
  4. Step 4: Simplify right side
    21,272.32x = 657,791,611.08
  5. Step 5: Solve for x
    x = 657,791,611.08/21,272.32
  6. Step 6: Final answer
    x = 30,922.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.