Home / 5,261.55-7,886.85-2,140.21

Finding the Fourth Proportional to 5,261.55, 7,886.85 and 2,140.21

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Solution

The fourth proportional to 5,261.55, 7,886.85 and 2,140.21 is: 3,208.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,261.55 : 7,886.85 = 2,140.21 : x
  2. Step 2: Convert to fraction form
    5,261.55/7,886.85 = 2,140.21/x
  3. Step 3: Cross multiply
    5,261.55x = 7,886.85 × 2,140.21
  4. Step 4: Simplify right side
    5,261.55x = 16,879,515.24
  5. Step 5: Solve for x
    x = 16,879,515.24/5,261.55
  6. Step 6: Final answer
    x = 3,208.09

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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.