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Finding the Fourth Proportional to 3,916.01, 5,404.05 and 2,147.60

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Solution

The fourth proportional to 3,916.01, 5,404.05 and 2,147.60 is: 2,963.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,916.01 : 5,404.05 = 2,147.60 : x
  2. Step 2: Convert to fraction form
    3,916.01/5,404.05 = 2,147.60/x
  3. Step 3: Cross multiply
    3,916.01x = 5,404.05 × 2,147.60
  4. Step 4: Simplify right side
    3,916.01x = 11,605,751.29
  5. Step 5: Solve for x
    x = 11,605,751.29/3,916.01
  6. Step 6: Final answer
    x = 2,963.67

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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.