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Finding the Fourth Proportional to 3,615.71, 4,986.56 and 2,672.87

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Solution

The fourth proportional to 3,615.71, 4,986.56 and 2,672.87 is: 3,686.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,615.71 : 4,986.56 = 2,672.87 : x
  2. Step 2: Convert to fraction form
    3,615.71/4,986.56 = 2,672.87/x
  3. Step 3: Cross multiply
    3,615.71x = 4,986.56 × 2,672.87
  4. Step 4: Simplify right side
    3,615.71x = 13,328,408.38
  5. Step 5: Solve for x
    x = 13,328,408.38/3,615.71
  6. Step 6: Final answer
    x = 3,686.25

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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.