Home / 3,889.80-5,364.32-2,561.21

Finding the Fourth Proportional to 3,889.80, 5,364.32 and 2,561.21

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Solution

The fourth proportional to 3,889.80, 5,364.32 and 2,561.21 is: 3,532.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,889.80 : 5,364.32 = 2,561.21 : x
  2. Step 2: Convert to fraction form
    3,889.80/5,364.32 = 2,561.21/x
  3. Step 3: Cross multiply
    3,889.80x = 5,364.32 × 2,561.21
  4. Step 4: Simplify right side
    3,889.80x = 13,739,110.40
  5. Step 5: Solve for x
    x = 13,739,110.40/3,889.80
  6. Step 6: Final answer
    x = 3,532.09

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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.