Home / 3,129.27-4,317.58-1,869.77

Finding the Fourth Proportional to 3,129.27, 4,317.58 and 1,869.77

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Solution

The fourth proportional to 3,129.27, 4,317.58 and 1,869.77 is: 2,579.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,129.27 : 4,317.58 = 1,869.77 : x
  2. Step 2: Convert to fraction form
    3,129.27/4,317.58 = 1,869.77/x
  3. Step 3: Cross multiply
    3,129.27x = 4,317.58 × 1,869.77
  4. Step 4: Simplify right side
    3,129.27x = 8,072,881.56
  5. Step 5: Solve for x
    x = 8,072,881.56/3,129.27
  6. Step 6: Final answer
    x = 2,579.80

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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.