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Finding the Fourth Proportional to 25,388.37, 35,025.09 and 15,311.08

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Solution

The fourth proportional to 25,388.37, 35,025.09 and 15,311.08 is: 21,122.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,388.37 : 35,025.09 = 15,311.08 : x
  2. Step 2: Convert to fraction form
    25,388.37/35,025.09 = 15,311.08/x
  3. Step 3: Cross multiply
    25,388.37x = 35,025.09 × 15,311.08
  4. Step 4: Simplify right side
    25,388.37x = 536,271,993.27
  5. Step 5: Solve for x
    x = 536,271,993.27/25,388.37
  6. Step 6: Final answer
    x = 21,122.74

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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.