Home / 11,289.20-16,935.76-4,720

Finding the Fourth Proportional to 11,289.20, 16,935.76 and 4,720

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Solution

The fourth proportional to 11,289.20, 16,935.76 and 4,720 is: 7,080.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,289.20 : 16,935.76 = 4,720 : x
  2. Step 2: Convert to fraction form
    11,289.20/16,935.76 = 4,720/x
  3. Step 3: Cross multiply
    11,289.20x = 16,935.76 × 4,720
  4. Step 4: Simplify right side
    11,289.20x = 79,936,787.20
  5. Step 5: Solve for x
    x = 79,936,787.20/11,289.20
  6. Step 6: Final answer
    x = 7,080.82

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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.