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Finding the Fourth Proportional to 13,611.70, 18,784.05 and 8,579.17

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Solution

The fourth proportional to 13,611.70, 18,784.05 and 8,579.17 is: 11,839.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,611.70 : 18,784.05 = 8,579.17 : x
  2. Step 2: Convert to fraction form
    13,611.70/18,784.05 = 8,579.17/x
  3. Step 3: Cross multiply
    13,611.70x = 18,784.05 × 8,579.17
  4. Step 4: Simplify right side
    13,611.70x = 161,151,558.24
  5. Step 5: Solve for x
    x = 161,151,558.24/13,611.70
  6. Step 6: Final answer
    x = 11,839.19

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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.