Home / 13,812.37-20,718.54-3,424.12

Finding the Fourth Proportional to 13,812.37, 20,718.54 and 3,424.12

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Solution

The fourth proportional to 13,812.37, 20,718.54 and 3,424.12 is: 5,136.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,812.37 : 20,718.54 = 3,424.12 : x
  2. Step 2: Convert to fraction form
    13,812.37/20,718.54 = 3,424.12/x
  3. Step 3: Cross multiply
    13,812.37x = 20,718.54 × 3,424.12
  4. Step 4: Simplify right side
    13,812.37x = 70,942,767.18
  5. Step 5: Solve for x
    x = 70,942,767.18/13,812.37
  6. Step 6: Final answer
    x = 5,136.18

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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.