Home / 21,116.09-31,664.42-7,960.07

Finding the Fourth Proportional to 21,116.09, 31,664.42 and 7,960.07

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Solution

The fourth proportional to 21,116.09, 31,664.42 and 7,960.07 is: 11,936.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,116.09 : 31,664.42 = 7,960.07 : x
  2. Step 2: Convert to fraction form
    21,116.09/31,664.42 = 7,960.07/x
  3. Step 3: Cross multiply
    21,116.09x = 31,664.42 × 7,960.07
  4. Step 4: Simplify right side
    21,116.09x = 252,051,068.92
  5. Step 5: Solve for x
    x = 252,051,068.92/21,116.09
  6. Step 6: Final answer
    x = 11,936.44

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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.