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Finding the Fourth Proportional to 12,389.99, 17,074.55 and 12,162.23

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Solution

The fourth proportional to 12,389.99, 17,074.55 and 12,162.23 is: 16,760.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,389.99 : 17,074.55 = 12,162.23 : x
  2. Step 2: Convert to fraction form
    12,389.99/17,074.55 = 12,162.23/x
  3. Step 3: Cross multiply
    12,389.99x = 17,074.55 × 12,162.23
  4. Step 4: Simplify right side
    12,389.99x = 207,664,613.31
  5. Step 5: Solve for x
    x = 207,664,613.31/12,389.99
  6. Step 6: Final answer
    x = 16,760.68

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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.