Home / 21,243.75-31,869.42-8,756.83

Finding the Fourth Proportional to 21,243.75, 31,869.42 and 8,756.83

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Solution

The fourth proportional to 21,243.75, 31,869.42 and 8,756.83 is: 13,136.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,243.75 : 31,869.42 = 8,756.83 : x
  2. Step 2: Convert to fraction form
    21,243.75/31,869.42 = 8,756.83/x
  3. Step 3: Cross multiply
    21,243.75x = 31,869.42 × 8,756.83
  4. Step 4: Simplify right side
    21,243.75x = 279,075,093.14
  5. Step 5: Solve for x
    x = 279,075,093.14/21,243.75
  6. Step 6: Final answer
    x = 13,136.81

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1.5x scale

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.