Home / 3,129.60-4,685.76-1,828.80

Finding the Fourth Proportional to 3,129.60, 4,685.76 and 1,828.80

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Solution

The fourth proportional to 3,129.60, 4,685.76 and 1,828.80 is: 2,738.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,129.60 : 4,685.76 = 1,828.80 : x
  2. Step 2: Convert to fraction form
    3,129.60/4,685.76 = 1,828.80/x
  3. Step 3: Cross multiply
    3,129.60x = 4,685.76 × 1,828.80
  4. Step 4: Simplify right side
    3,129.60x = 8,569,317.89
  5. Step 5: Solve for x
    x = 8,569,317.89/3,129.60
  6. Step 6: Final answer
    x = 2,738.15

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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.