Home / 38,460.40-57,739.20-20,705.20

Finding the Fourth Proportional to 38,460.40, 57,739.20 and 20,705.20

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Solution

The fourth proportional to 38,460.40, 57,739.20 and 20,705.20 is: 31,083.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,460.40 : 57,739.20 = 20,705.20 : x
  2. Step 2: Convert to fraction form
    38,460.40/57,739.20 = 20,705.20/x
  3. Step 3: Cross multiply
    38,460.40x = 57,739.20 × 20,705.20
  4. Step 4: Simplify right side
    38,460.40x = 1,195,501,683.84
  5. Step 5: Solve for x
    x = 1,195,501,683.84/38,460.40
  6. Step 6: Final answer
    x = 31,083.96

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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.