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Finding the Fourth Proportional to 39,376.60, 54,339.74 and 21,471.64

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Solution

The fourth proportional to 39,376.60, 54,339.74 and 21,471.64 is: 29,630.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,376.60 : 54,339.74 = 21,471.64 : x
  2. Step 2: Convert to fraction form
    39,376.60/54,339.74 = 21,471.64/x
  3. Step 3: Cross multiply
    39,376.60x = 54,339.74 × 21,471.64
  4. Step 4: Simplify right side
    39,376.60x = 1,166,763,334.97
  5. Step 5: Solve for x
    x = 1,166,763,334.97/39,376.60
  6. Step 6: Final answer
    x = 29,630.88

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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.