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Finding the Fourth Proportional to 38,490.60, 57,735.90 and 18,807.60

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Solution

The fourth proportional to 38,490.60, 57,735.90 and 18,807.60 is: 28,211.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,490.60 : 57,735.90 = 18,807.60 : x
  2. Step 2: Convert to fraction form
    38,490.60/57,735.90 = 18,807.60/x
  3. Step 3: Cross multiply
    38,490.60x = 57,735.90 × 18,807.60
  4. Step 4: Simplify right side
    38,490.60x = 1,085,873,712.84
  5. Step 5: Solve for x
    x = 1,085,873,712.84/38,490.60
  6. Step 6: Final answer
    x = 28,211.40

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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.