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Finding the Fourth Proportional to 12,611.55, 17,405.99 and 7,309.44

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Solution

The fourth proportional to 12,611.55, 17,405.99 and 7,309.44 is: 10,088.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,611.55 : 17,405.99 = 7,309.44 : x
  2. Step 2: Convert to fraction form
    12,611.55/17,405.99 = 7,309.44/x
  3. Step 3: Cross multiply
    12,611.55x = 17,405.99 × 7,309.44
  4. Step 4: Simplify right side
    12,611.55x = 127,228,039.55
  5. Step 5: Solve for x
    x = 127,228,039.55/12,611.55
  6. Step 6: Final answer
    x = 10,088.22

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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.