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Finding the Fourth Proportional to 5,811.76, 8,020.22 and 3,159.16

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Solution

The fourth proportional to 5,811.76, 8,020.22 and 3,159.16 is: 4,359.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,811.76 : 8,020.22 = 3,159.16 : x
  2. Step 2: Convert to fraction form
    5,811.76/8,020.22 = 3,159.16/x
  3. Step 3: Cross multiply
    5,811.76x = 8,020.22 × 3,159.16
  4. Step 4: Simplify right side
    5,811.76x = 25,337,158.22
  5. Step 5: Solve for x
    x = 25,337,158.22/5,811.76
  6. Step 6: Final answer
    x = 4,359.64

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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.