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Finding the Fourth Proportional to 12,008.40, 17,999.10 and 5,771.40

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Solution

The fourth proportional to 12,008.40, 17,999.10 and 5,771.40 is: 8,650.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,008.40 : 17,999.10 = 5,771.40 : x
  2. Step 2: Convert to fraction form
    12,008.40/17,999.10 = 5,771.40/x
  3. Step 3: Cross multiply
    12,008.40x = 17,999.10 × 5,771.40
  4. Step 4: Simplify right side
    12,008.40x = 103,880,005.74
  5. Step 5: Solve for x
    x = 103,880,005.74/12,008.40
  6. Step 6: Final answer
    x = 8,650.61

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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.