Home / 13,405.30-20,108.18-4,640.49

Finding the Fourth Proportional to 13,405.30, 20,108.18 and 4,640.49

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Solution

The fourth proportional to 13,405.30, 20,108.18 and 4,640.49 is: 6,960.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,405.30 : 20,108.18 = 4,640.49 : x
  2. Step 2: Convert to fraction form
    13,405.30/20,108.18 = 4,640.49/x
  3. Step 3: Cross multiply
    13,405.30x = 20,108.18 × 4,640.49
  4. Step 4: Simplify right side
    13,405.30x = 93,311,819.81
  5. Step 5: Solve for x
    x = 93,311,819.81/13,405.30
  6. Step 6: Final answer
    x = 6,960.82

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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.