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Finding the Fourth Proportional to 4,000, 5,520.56 and 2,605.72

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Solution

The fourth proportional to 4,000, 5,520.56 and 2,605.72 is: 3,596.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,000 : 5,520.56 = 2,605.72 : x
  2. Step 2: Convert to fraction form
    4,000/5,520.56 = 2,605.72/x
  3. Step 3: Cross multiply
    4,000x = 5,520.56 × 2,605.72
  4. Step 4: Simplify right side
    4,000x = 14,385,033.60
  5. Step 5: Solve for x
    x = 14,385,033.60/4,000
  6. Step 6: Final answer
    x = 3,596.26

Related Problems

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Double scale
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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.