Home / 15,384.42-21,234.69-10,908.90

Finding the Fourth Proportional to 15,384.42, 21,234.69 and 10,908.90

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Solution

The fourth proportional to 15,384.42, 21,234.69 and 10,908.90 is: 15,057.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,384.42 : 21,234.69 = 10,908.90 : x
  2. Step 2: Convert to fraction form
    15,384.42/21,234.69 = 10,908.90/x
  3. Step 3: Cross multiply
    15,384.42x = 21,234.69 × 10,908.90
  4. Step 4: Simplify right side
    15,384.42x = 231,647,109.74
  5. Step 5: Solve for x
    x = 231,647,109.74/15,384.42
  6. Step 6: Final answer
    x = 15,057.25

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1.5x scale

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.