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Finding the Fourth Proportional to 8,611.53, 11,885.21 and 5,256.30

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Solution

The fourth proportional to 8,611.53, 11,885.21 and 5,256.30 is: 7,254.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,611.53 : 11,885.21 = 5,256.30 : x
  2. Step 2: Convert to fraction form
    8,611.53/11,885.21 = 5,256.30/x
  3. Step 3: Cross multiply
    8,611.53x = 11,885.21 × 5,256.30
  4. Step 4: Simplify right side
    8,611.53x = 62,472,203.26
  5. Step 5: Solve for x
    x = 62,472,203.26/8,611.53
  6. Step 6: Final answer
    x = 7,254.48

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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.