Home / 30,558.32-42,170.34-17,129.56

Finding the Fourth Proportional to 30,558.32, 42,170.34 and 17,129.56

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Solution

The fourth proportional to 30,558.32, 42,170.34 and 17,129.56 is: 23,638.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,558.32 : 42,170.34 = 17,129.56 : x
  2. Step 2: Convert to fraction form
    30,558.32/42,170.34 = 17,129.56/x
  3. Step 3: Cross multiply
    30,558.32x = 42,170.34 × 17,129.56
  4. Step 4: Simplify right side
    30,558.32x = 722,359,369.25
  5. Step 5: Solve for x
    x = 722,359,369.25/30,558.32
  6. Step 6: Final answer
    x = 23,638.71

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1.5x scale

Why These Related Problems?

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