Home / 39,656.72-54,729.78-21,755.21

Finding the Fourth Proportional to 39,656.72, 54,729.78 and 21,755.21

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Solution

The fourth proportional to 39,656.72, 54,729.78 and 21,755.21 is: 30,024.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,656.72 : 54,729.78 = 21,755.21 : x
  2. Step 2: Convert to fraction form
    39,656.72/54,729.78 = 21,755.21/x
  3. Step 3: Cross multiply
    39,656.72x = 54,729.78 × 21,755.21
  4. Step 4: Simplify right side
    39,656.72x = 1,190,657,993.98
  5. Step 5: Solve for x
    x = 1,190,657,993.98/39,656.72
  6. Step 6: Final answer
    x = 30,024.12

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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.