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Finding the Fourth Proportional to 11,762.15, 16,218.70 and 11,489.99

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Solution

The fourth proportional to 11,762.15, 16,218.70 and 11,489.99 is: 15,843.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,762.15 : 16,218.70 = 11,489.99 : x
  2. Step 2: Convert to fraction form
    11,762.15/16,218.70 = 11,489.99/x
  3. Step 3: Cross multiply
    11,762.15x = 16,218.70 × 11,489.99
  4. Step 4: Simplify right side
    11,762.15x = 186,352,590.99
  5. Step 5: Solve for x
    x = 186,352,590.99/11,762.15
  6. Step 6: Final answer
    x = 15,843.42

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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.