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Finding the Fourth Proportional to 12,861.61, 17,751.33 and 7,556.44

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Solution

The fourth proportional to 12,861.61, 17,751.33 and 7,556.44 is: 10,429.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,861.61 : 17,751.33 = 7,556.44 : x
  2. Step 2: Convert to fraction form
    12,861.61/17,751.33 = 7,556.44/x
  3. Step 3: Cross multiply
    12,861.61x = 17,751.33 × 7,556.44
  4. Step 4: Simplify right side
    12,861.61x = 134,136,860.07
  5. Step 5: Solve for x
    x = 134,136,860.07/12,861.61
  6. Step 6: Final answer
    x = 10,429.24

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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.