Home / 15,172.35-20,927.59-13,179.43

Finding the Fourth Proportional to 15,172.35, 20,927.59 and 13,179.43

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Solution

The fourth proportional to 15,172.35, 20,927.59 and 13,179.43 is: 18,178.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,172.35 : 20,927.59 = 13,179.43 : x
  2. Step 2: Convert to fraction form
    15,172.35/20,927.59 = 13,179.43/x
  3. Step 3: Cross multiply
    15,172.35x = 20,927.59 × 13,179.43
  4. Step 4: Simplify right side
    15,172.35x = 275,813,707.47
  5. Step 5: Solve for x
    x = 275,813,707.47/15,172.35
  6. Step 6: Final answer
    x = 18,178.71

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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.