Home / 25,728.64-35,511.44-15,121.76

Finding the Fourth Proportional to 25,728.64, 35,511.44 and 15,121.76

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Solution

The fourth proportional to 25,728.64, 35,511.44 and 15,121.76 is: 20,871.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,728.64 : 35,511.44 = 15,121.76 : x
  2. Step 2: Convert to fraction form
    25,728.64/35,511.44 = 15,121.76/x
  3. Step 3: Cross multiply
    25,728.64x = 35,511.44 × 15,121.76
  4. Step 4: Simplify right side
    25,728.64x = 536,995,472.93
  5. Step 5: Solve for x
    x = 536,995,472.93/25,728.64
  6. Step 6: Final answer
    x = 20,871.51

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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.