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Finding the Fourth Proportional to 38,993.58, 58,490.34 and 12,698.31

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Solution

The fourth proportional to 38,993.58, 58,490.34 and 12,698.31 is: 19,047.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,993.58 : 58,490.34 = 12,698.31 : x
  2. Step 2: Convert to fraction form
    38,993.58/58,490.34 = 12,698.31/x
  3. Step 3: Cross multiply
    38,993.58x = 58,490.34 × 12,698.31
  4. Step 4: Simplify right side
    38,993.58x = 742,728,469.33
  5. Step 5: Solve for x
    x = 742,728,469.33/38,993.58
  6. Step 6: Final answer
    x = 19,047.46

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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.