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Finding the Fourth Proportional to 30,313.44, 41,813.52 and 20,865.60

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Solution

The fourth proportional to 30,313.44, 41,813.52 and 20,865.60 is: 28,781.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,313.44 : 41,813.52 = 20,865.60 : x
  2. Step 2: Convert to fraction form
    30,313.44/41,813.52 = 20,865.60/x
  3. Step 3: Cross multiply
    30,313.44x = 41,813.52 × 20,865.60
  4. Step 4: Simplify right side
    30,313.44x = 872,464,182.91
  5. Step 5: Solve for x
    x = 872,464,182.91/30,313.44
  6. Step 6: Final answer
    x = 28,781.43

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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.