Home / 25,729.92-35,540.64-21,271.68

Finding the Fourth Proportional to 25,729.92, 35,540.64 and 21,271.68

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Solution

The fourth proportional to 25,729.92, 35,540.64 and 21,271.68 is: 29,382.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,729.92 : 35,540.64 = 21,271.68 : x
  2. Step 2: Convert to fraction form
    25,729.92/35,540.64 = 21,271.68/x
  3. Step 3: Cross multiply
    25,729.92x = 35,540.64 × 21,271.68
  4. Step 4: Simplify right side
    25,729.92x = 756,009,121.08
  5. Step 5: Solve for x
    x = 756,009,121.08/25,729.92
  6. Step 6: Final answer
    x = 29,382.49

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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.