Home / 25,728.21-35,511.90-15,121.26

Finding the Fourth Proportional to 25,728.21, 35,511.90 and 15,121.26

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Solution

The fourth proportional to 25,728.21, 35,511.90 and 15,121.26 is: 20,871.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,728.21 : 35,511.90 = 15,121.26 : x
  2. Step 2: Convert to fraction form
    25,728.21/35,511.90 = 15,121.26/x
  3. Step 3: Cross multiply
    25,728.21x = 35,511.90 × 15,121.26
  4. Step 4: Simplify right side
    25,728.21x = 536,984,672.99
  5. Step 5: Solve for x
    x = 536,984,672.99/25,728.21
  6. Step 6: Final answer
    x = 20,871.44

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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.