Home / 5,261.40-7,892.10-3,187.80

Finding the Fourth Proportional to 5,261.40, 7,892.10 and 3,187.80

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Solution

The fourth proportional to 5,261.40, 7,892.10 and 3,187.80 is: 4,781.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,261.40 : 7,892.10 = 3,187.80 : x
  2. Step 2: Convert to fraction form
    5,261.40/7,892.10 = 3,187.80/x
  3. Step 3: Cross multiply
    5,261.40x = 7,892.10 × 3,187.80
  4. Step 4: Simplify right side
    5,261.40x = 25,158,436.38
  5. Step 5: Solve for x
    x = 25,158,436.38/5,261.40
  6. Step 6: Final answer
    x = 4,781.70

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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.