Home / 30,751.98-42,444.63-20,135.43

Finding the Fourth Proportional to 30,751.98, 42,444.63 and 20,135.43

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Solution

The fourth proportional to 30,751.98, 42,444.63 and 20,135.43 is: 27,791.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,751.98 : 42,444.63 = 20,135.43 : x
  2. Step 2: Convert to fraction form
    30,751.98/42,444.63 = 20,135.43/x
  3. Step 3: Cross multiply
    30,751.98x = 42,444.63 × 20,135.43
  4. Step 4: Simplify right side
    30,751.98x = 854,640,876.24
  5. Step 5: Solve for x
    x = 854,640,876.24/30,751.98
  6. Step 6: Final answer
    x = 27,791.41

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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.