Home / 30,911.08-42,645.21-20,168.59

Finding the Fourth Proportional to 30,911.08, 42,645.21 and 20,168.59

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Solution

The fourth proportional to 30,911.08, 42,645.21 and 20,168.59 is: 27,824.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,911.08 : 42,645.21 = 20,168.59 : x
  2. Step 2: Convert to fraction form
    30,911.08/42,645.21 = 20,168.59/x
  3. Step 3: Cross multiply
    30,911.08x = 42,645.21 × 20,168.59
  4. Step 4: Simplify right side
    30,911.08x = 860,093,755.95
  5. Step 5: Solve for x
    x = 860,093,755.95/30,911.08
  6. Step 6: Final answer
    x = 27,824.77

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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.