Home / 5,811.20-8,021.30-3,715.32

Finding the Fourth Proportional to 5,811.20, 8,021.30 and 3,715.32

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Solution

The fourth proportional to 5,811.20, 8,021.30 and 3,715.32 is: 5,128.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,811.20 : 8,021.30 = 3,715.32 : x
  2. Step 2: Convert to fraction form
    5,811.20/8,021.30 = 3,715.32/x
  3. Step 3: Cross multiply
    5,811.20x = 8,021.30 × 3,715.32
  4. Step 4: Simplify right side
    5,811.20x = 29,801,696.32
  5. Step 5: Solve for x
    x = 29,801,696.32/5,811.20
  6. Step 6: Final answer
    x = 5,128.32

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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.