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Finding the Fourth Proportional to 11,319.71, 16,980.95 and 2,999.90

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Solution

The fourth proportional to 11,319.71, 16,980.95 and 2,999.90 is: 4,500.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,319.71 : 16,980.95 = 2,999.90 : x
  2. Step 2: Convert to fraction form
    11,319.71/16,980.95 = 2,999.90/x
  3. Step 3: Cross multiply
    11,319.71x = 16,980.95 × 2,999.90
  4. Step 4: Simplify right side
    11,319.71x = 50,941,201.86
  5. Step 5: Solve for x
    x = 50,941,201.86/11,319.71
  6. Step 6: Final answer
    x = 4,500.22

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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.