Home / 5,661.15-7,812.11-3,143.23

Finding the Fourth Proportional to 5,661.15, 7,812.11 and 3,143.23

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Solution

The fourth proportional to 5,661.15, 7,812.11 and 3,143.23 is: 4,337.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,661.15 : 7,812.11 = 3,143.23 : x
  2. Step 2: Convert to fraction form
    5,661.15/7,812.11 = 3,143.23/x
  3. Step 3: Cross multiply
    5,661.15x = 7,812.11 × 3,143.23
  4. Step 4: Simplify right side
    5,661.15x = 24,555,258.52
  5. Step 5: Solve for x
    x = 24,555,258.52/5,661.15
  6. Step 6: Final answer
    x = 4,337.50

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Double scale
Find fourth proportional to 5,662.15, 7,813.49 and 3,144.23
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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.