Home / 14,215.93-21,315.39-6,721.42

Finding the Fourth Proportional to 14,215.93, 21,315.39 and 6,721.42

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Solution

The fourth proportional to 14,215.93, 21,315.39 and 6,721.42 is: 10,078.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,215.93 : 21,315.39 = 6,721.42 : x
  2. Step 2: Convert to fraction form
    14,215.93/21,315.39 = 6,721.42/x
  3. Step 3: Cross multiply
    14,215.93x = 21,315.39 × 6,721.42
  4. Step 4: Simplify right side
    14,215.93x = 143,269,688.65
  5. Step 5: Solve for x
    x = 143,269,688.65/14,215.93
  6. Step 6: Final answer
    x = 10,078.11

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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.