Home / 3,129.30-4,317.71-2,136.65

Finding the Fourth Proportional to 3,129.30, 4,317.71 and 2,136.65

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Solution

The fourth proportional to 3,129.30, 4,317.71 and 2,136.65 is: 2,948.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,129.30 : 4,317.71 = 2,136.65 : x
  2. Step 2: Convert to fraction form
    3,129.30/4,317.71 = 2,136.65/x
  3. Step 3: Cross multiply
    3,129.30x = 4,317.71 × 2,136.65
  4. Step 4: Simplify right side
    3,129.30x = 9,225,402.80
  5. Step 5: Solve for x
    x = 9,225,402.80/3,129.30
  6. Step 6: Final answer
    x = 2,948.07

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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.