Home / 4,121.87-5,688-2,420.13

Finding the Fourth Proportional to 4,121.87, 5,688 and 2,420.13

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Solution

The fourth proportional to 4,121.87, 5,688 and 2,420.13 is: 3,339.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,121.87 : 5,688 = 2,420.13 : x
  2. Step 2: Convert to fraction form
    4,121.87/5,688 = 2,420.13/x
  3. Step 3: Cross multiply
    4,121.87x = 5,688 × 2,420.13
  4. Step 4: Simplify right side
    4,121.87x = 13,765,720.77
  5. Step 5: Solve for x
    x = 13,765,720.77/4,121.87
  6. Step 6: Final answer
    x = 3,339.68

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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.