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Finding the Fourth Proportional to 38,476.60, 57,714.90 and 31,915.60

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Solution

The fourth proportional to 38,476.60, 57,714.90 and 31,915.60 is: 47,873.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,476.60 : 57,714.90 = 31,915.60 : x
  2. Step 2: Convert to fraction form
    38,476.60/57,714.90 = 31,915.60/x
  3. Step 3: Cross multiply
    38,476.60x = 57,714.90 × 31,915.60
  4. Step 4: Simplify right side
    38,476.60x = 1,842,005,662.44
  5. Step 5: Solve for x
    x = 1,842,005,662.44/38,476.60
  6. Step 6: Final answer
    x = 47,873.40

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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.