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Finding the Fourth Proportional to 2,161.60, 3,237.60 and 2,113.60

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Solution

The fourth proportional to 2,161.60, 3,237.60 and 2,113.60 is: 3,165.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,161.60 : 3,237.60 = 2,113.60 : x
  2. Step 2: Convert to fraction form
    2,161.60/3,237.60 = 2,113.60/x
  3. Step 3: Cross multiply
    2,161.60x = 3,237.60 × 2,113.60
  4. Step 4: Simplify right side
    2,161.60x = 6,842,991.36
  5. Step 5: Solve for x
    x = 6,842,991.36/2,161.60
  6. Step 6: Final answer
    x = 3,165.71

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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.