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Finding the Fourth Proportional to 12,062.85, 18,080.30 and 7,136.64

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Solution

The fourth proportional to 12,062.85, 18,080.30 and 7,136.64 is: 10,696.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,062.85 : 18,080.30 = 7,136.64 : x
  2. Step 2: Convert to fraction form
    12,062.85/18,080.30 = 7,136.64/x
  3. Step 3: Cross multiply
    12,062.85x = 18,080.30 × 7,136.64
  4. Step 4: Simplify right side
    12,062.85x = 129,032,556.51
  5. Step 5: Solve for x
    x = 129,032,556.51/12,062.85
  6. Step 6: Final answer
    x = 10,696.69

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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.