Home / 12,621.71-18,936.21-5,224.79

Finding the Fourth Proportional to 12,621.71, 18,936.21 and 5,224.79

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Solution

The fourth proportional to 12,621.71, 18,936.21 and 5,224.79 is: 7,838.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,621.71 : 18,936.21 = 5,224.79 : x
  2. Step 2: Convert to fraction form
    12,621.71/18,936.21 = 5,224.79/x
  3. Step 3: Cross multiply
    12,621.71x = 18,936.21 × 5,224.79
  4. Step 4: Simplify right side
    12,621.71x = 98,937,720.65
  5. Step 5: Solve for x
    x = 98,937,720.65/12,621.71
  6. Step 6: Final answer
    x = 7,838.69

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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.