Home / 5,811.47-8,019.86-3,158.90

Finding the Fourth Proportional to 5,811.47, 8,019.86 and 3,158.90

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Solution

The fourth proportional to 5,811.47, 8,019.86 and 3,158.90 is: 4,359.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,811.47 : 8,019.86 = 3,158.90 : x
  2. Step 2: Convert to fraction form
    5,811.47/8,019.86 = 3,158.90/x
  3. Step 3: Cross multiply
    5,811.47x = 8,019.86 × 3,158.90
  4. Step 4: Simplify right side
    5,811.47x = 25,333,879.86
  5. Step 5: Solve for x
    x = 25,333,879.86/5,811.47
  6. Step 6: Final answer
    x = 4,359.29

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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.