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Finding the Fourth Proportional to 5,638.53, 8,448.21 and 3,987

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Solution

The fourth proportional to 5,638.53, 8,448.21 and 3,987 is: 5,973.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,638.53 : 8,448.21 = 3,987 : x
  2. Step 2: Convert to fraction form
    5,638.53/8,448.21 = 3,987/x
  3. Step 3: Cross multiply
    5,638.53x = 8,448.21 × 3,987
  4. Step 4: Simplify right side
    5,638.53x = 33,683,013.27
  5. Step 5: Solve for x
    x = 33,683,013.27/5,638.53
  6. Step 6: Final answer
    x = 5,973.72

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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.