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Finding the Fourth Proportional to 38,336.80, 57,570.80 and 20,840.80

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Solution

The fourth proportional to 38,336.80, 57,570.80 and 20,840.80 is: 31,296.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,336.80 : 57,570.80 = 20,840.80 : x
  2. Step 2: Convert to fraction form
    38,336.80/57,570.80 = 20,840.80/x
  3. Step 3: Cross multiply
    38,336.80x = 57,570.80 × 20,840.80
  4. Step 4: Simplify right side
    38,336.80x = 1,199,821,528.64
  5. Step 5: Solve for x
    x = 1,199,821,528.64/38,336.80
  6. Step 6: Final answer
    x = 31,296.86

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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.