Home / 20,908.53-28,853.82-11,477.70

Finding the Fourth Proportional to 20,908.53, 28,853.82 and 11,477.70

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Solution

The fourth proportional to 20,908.53, 28,853.82 and 11,477.70 is: 15,839.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,908.53 : 28,853.82 = 11,477.70 : x
  2. Step 2: Convert to fraction form
    20,908.53/28,853.82 = 11,477.70/x
  3. Step 3: Cross multiply
    20,908.53x = 28,853.82 × 11,477.70
  4. Step 4: Simplify right side
    20,908.53x = 331,175,489.81
  5. Step 5: Solve for x
    x = 331,175,489.81/20,908.53
  6. Step 6: Final answer
    x = 15,839.25

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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.