Home / 30,558.05-42,170.05-17,129.30

Finding the Fourth Proportional to 30,558.05, 42,170.05 and 17,129.30

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Solution

The fourth proportional to 30,558.05, 42,170.05 and 17,129.30 is: 23,638.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,558.05 : 42,170.05 = 17,129.30 : x
  2. Step 2: Convert to fraction form
    30,558.05/42,170.05 = 17,129.30/x
  3. Step 3: Cross multiply
    30,558.05x = 42,170.05 × 17,129.30
  4. Step 4: Simplify right side
    30,558.05x = 722,343,183.79
  5. Step 5: Solve for x
    x = 722,343,183.79/30,558.05
  6. Step 6: Final answer
    x = 23,638.40

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.