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Finding the Fourth Proportional to 13,611.53, 18,784.37 and 7,644.26

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Solution

The fourth proportional to 13,611.53, 18,784.37 and 7,644.26 is: 10,549.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,611.53 : 18,784.37 = 7,644.26 : x
  2. Step 2: Convert to fraction form
    13,611.53/18,784.37 = 7,644.26/x
  3. Step 3: Cross multiply
    13,611.53x = 18,784.37 × 7,644.26
  4. Step 4: Simplify right side
    13,611.53x = 143,592,569.99
  5. Step 5: Solve for x
    x = 143,592,569.99/13,611.53
  6. Step 6: Final answer
    x = 10,549.33

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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.