Home / 20,705.49-28,573.38-11,274.21

Finding the Fourth Proportional to 20,705.49, 28,573.38 and 11,274.21

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Solution

The fourth proportional to 20,705.49, 28,573.38 and 11,274.21 is: 15,558.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,705.49 : 28,573.38 = 11,274.21 : x
  2. Step 2: Convert to fraction form
    20,705.49/28,573.38 = 11,274.21/x
  3. Step 3: Cross multiply
    20,705.49x = 28,573.38 × 11,274.21
  4. Step 4: Simplify right side
    20,705.49x = 322,142,286.53
  5. Step 5: Solve for x
    x = 322,142,286.53/20,705.49
  6. Step 6: Final answer
    x = 15,558.30

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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.