Home / 5,431.28-8,147.32-2,660.28

Finding the Fourth Proportional to 5,431.28, 8,147.32 and 2,660.28

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Solution

The fourth proportional to 5,431.28, 8,147.32 and 2,660.28 is: 3,990.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,431.28 : 8,147.32 = 2,660.28 : x
  2. Step 2: Convert to fraction form
    5,431.28/8,147.32 = 2,660.28/x
  3. Step 3: Cross multiply
    5,431.28x = 8,147.32 × 2,660.28
  4. Step 4: Simplify right side
    5,431.28x = 21,674,152.45
  5. Step 5: Solve for x
    x = 21,674,152.45/5,431.28
  6. Step 6: Final answer
    x = 3,990.62

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.