Home / 3,887.13-5,828.81-1,420.28

Finding the Fourth Proportional to 3,887.13, 5,828.81 and 1,420.28

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Solution

The fourth proportional to 3,887.13, 5,828.81 and 1,420.28 is: 2,129.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,887.13 : 5,828.81 = 1,420.28 : x
  2. Step 2: Convert to fraction form
    3,887.13/5,828.81 = 1,420.28/x
  3. Step 3: Cross multiply
    3,887.13x = 5,828.81 × 1,420.28
  4. Step 4: Simplify right side
    3,887.13x = 8,278,506.02
  5. Step 5: Solve for x
    x = 8,278,506.02/3,887.13
  6. Step 6: Final answer
    x = 2,129.72

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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.