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Finding the Fourth Proportional to 5,720.77, 8,581.16 and 2,431.56

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Solution

The fourth proportional to 5,720.77, 8,581.16 and 2,431.56 is: 3,647.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,720.77 : 8,581.16 = 2,431.56 : x
  2. Step 2: Convert to fraction form
    5,720.77/8,581.16 = 2,431.56/x
  3. Step 3: Cross multiply
    5,720.77x = 8,581.16 × 2,431.56
  4. Step 4: Simplify right side
    5,720.77x = 20,865,605.41
  5. Step 5: Solve for x
    x = 20,865,605.41/5,720.77
  6. Step 6: Final answer
    x = 3,647.34

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Double scale
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Similar ratio
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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.