Home / 20,952.81-28,914.39-11,392.56

Finding the Fourth Proportional to 20,952.81, 28,914.39 and 11,392.56

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Solution

The fourth proportional to 20,952.81, 28,914.39 and 11,392.56 is: 15,721.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,952.81 : 28,914.39 = 11,392.56 : x
  2. Step 2: Convert to fraction form
    20,952.81/28,914.39 = 11,392.56/x
  3. Step 3: Cross multiply
    20,952.81x = 28,914.39 × 11,392.56
  4. Step 4: Simplify right side
    20,952.81x = 329,408,922.94
  5. Step 5: Solve for x
    x = 329,408,922.94/20,952.81
  6. Step 6: Final answer
    x = 15,721.47

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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.