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Finding the Fourth Proportional to 3,881.58, 5,356.50 and 2,113.22

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Solution

The fourth proportional to 3,881.58, 5,356.50 and 2,113.22 is: 2,916.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,881.58 : 5,356.50 = 2,113.22 : x
  2. Step 2: Convert to fraction form
    3,881.58/5,356.50 = 2,113.22/x
  3. Step 3: Cross multiply
    3,881.58x = 5,356.50 × 2,113.22
  4. Step 4: Simplify right side
    3,881.58x = 11,319,436.15
  5. Step 5: Solve for x
    x = 11,319,436.15/3,881.58
  6. Step 6: Final answer
    x = 2,916.19

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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.