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Finding the Fourth Proportional to 3,986.54, 5,503.90 and 2,570.92

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Solution

The fourth proportional to 3,986.54, 5,503.90 and 2,570.92 is: 3,549.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,986.54 : 5,503.90 = 2,570.92 : x
  2. Step 2: Convert to fraction form
    3,986.54/5,503.90 = 2,570.92/x
  3. Step 3: Cross multiply
    3,986.54x = 5,503.90 × 2,570.92
  4. Step 4: Simplify right side
    3,986.54x = 14,150,086.59
  5. Step 5: Solve for x
    x = 14,150,086.59/3,986.54
  6. Step 6: Final answer
    x = 3,549.47

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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.