Home / 13,140.53-18,136.26-7,835.69

Finding the Fourth Proportional to 13,140.53, 18,136.26 and 7,835.69

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Solution

The fourth proportional to 13,140.53, 18,136.26 and 7,835.69 is: 10,814.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,140.53 : 18,136.26 = 7,835.69 : x
  2. Step 2: Convert to fraction form
    13,140.53/18,136.26 = 7,835.69/x
  3. Step 3: Cross multiply
    13,140.53x = 18,136.26 × 7,835.69
  4. Step 4: Simplify right side
    13,140.53x = 142,110,020.44
  5. Step 5: Solve for x
    x = 142,110,020.44/13,140.53
  6. Step 6: Final answer
    x = 10,814.64

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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.