Home / 30,906.88-42,640.32-20,302.24

Finding the Fourth Proportional to 30,906.88, 42,640.32 and 20,302.24

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Solution

The fourth proportional to 30,906.88, 42,640.32 and 20,302.24 is: 28,009.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,906.88 : 42,640.32 = 20,302.24 : x
  2. Step 2: Convert to fraction form
    30,906.88/42,640.32 = 20,302.24/x
  3. Step 3: Cross multiply
    30,906.88x = 42,640.32 × 20,302.24
  4. Step 4: Simplify right side
    30,906.88x = 865,694,010.32
  5. Step 5: Solve for x
    x = 865,694,010.32/30,906.88
  6. Step 6: Final answer
    x = 28,009.75

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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.