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Finding the Fourth Proportional to 3,907.90, 5,393.82 and 2,581.66

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Solution

The fourth proportional to 3,907.90, 5,393.82 and 2,581.66 is: 3,563.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,907.90 : 5,393.82 = 2,581.66 : x
  2. Step 2: Convert to fraction form
    3,907.90/5,393.82 = 2,581.66/x
  3. Step 3: Cross multiply
    3,907.90x = 5,393.82 × 2,581.66
  4. Step 4: Simplify right side
    3,907.90x = 13,925,009.34
  5. Step 5: Solve for x
    x = 13,925,009.34/3,907.90
  6. Step 6: Final answer
    x = 3,563.30

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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.