Home / 21,131.98-31,712.32-11,278.17

Finding the Fourth Proportional to 21,131.98, 31,712.32 and 11,278.17

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Solution

The fourth proportional to 21,131.98, 31,712.32 and 11,278.17 is: 16,924.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,131.98 : 31,712.32 = 11,278.17 : x
  2. Step 2: Convert to fraction form
    21,131.98/31,712.32 = 11,278.17/x
  3. Step 3: Cross multiply
    21,131.98x = 31,712.32 × 11,278.17
  4. Step 4: Simplify right side
    21,131.98x = 357,656,936.05
  5. Step 5: Solve for x
    x = 357,656,936.05/21,131.98
  6. Step 6: Final answer
    x = 16,924.91

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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.