Home / 5,261.81-7,261.40-3,138.80

Finding the Fourth Proportional to 5,261.81, 7,261.40 and 3,138.80

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Solution

The fourth proportional to 5,261.81, 7,261.40 and 3,138.80 is: 4,331.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,261.81 : 7,261.40 = 3,138.80 : x
  2. Step 2: Convert to fraction form
    5,261.81/7,261.40 = 3,138.80/x
  3. Step 3: Cross multiply
    5,261.81x = 7,261.40 × 3,138.80
  4. Step 4: Simplify right side
    5,261.81x = 22,792,066.63
  5. Step 5: Solve for x
    x = 22,792,066.63/5,261.81
  6. Step 6: Final answer
    x = 4,331.60

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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.