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Finding the Fourth Proportional to 38,453.70, 57,680.55 and 20,957.70

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Solution

The fourth proportional to 38,453.70, 57,680.55 and 20,957.70 is: 31,436.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,453.70 : 57,680.55 = 20,957.70 : x
  2. Step 2: Convert to fraction form
    38,453.70/57,680.55 = 20,957.70/x
  3. Step 3: Cross multiply
    38,453.70x = 57,680.55 × 20,957.70
  4. Step 4: Simplify right side
    38,453.70x = 1,208,851,662.74
  5. Step 5: Solve for x
    x = 1,208,851,662.74/38,453.70
  6. Step 6: Final answer
    x = 31,436.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.