Home / 21,278.07-31,936.80-10,755.51

Finding the Fourth Proportional to 21,278.07, 31,936.80 and 10,755.51

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Solution

The fourth proportional to 21,278.07, 31,936.80 and 10,755.51 is: 16,143.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,278.07 : 31,936.80 = 10,755.51 : x
  2. Step 2: Convert to fraction form
    21,278.07/31,936.80 = 10,755.51/x
  3. Step 3: Cross multiply
    21,278.07x = 31,936.80 × 10,755.51
  4. Step 4: Simplify right side
    21,278.07x = 343,496,571.77
  5. Step 5: Solve for x
    x = 343,496,571.77/21,278.07
  6. Step 6: Final answer
    x = 16,143.22

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.