Home / 20,963.18-31,446.09-7,811.11

Finding the Fourth Proportional to 20,963.18, 31,446.09 and 7,811.11

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Solution

The fourth proportional to 20,963.18, 31,446.09 and 7,811.11 is: 11,717.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,963.18 : 31,446.09 = 7,811.11 : x
  2. Step 2: Convert to fraction form
    20,963.18/31,446.09 = 7,811.11/x
  3. Step 3: Cross multiply
    20,963.18x = 31,446.09 × 7,811.11
  4. Step 4: Simplify right side
    20,963.18x = 245,628,868.06
  5. Step 5: Solve for x
    x = 245,628,868.06/20,963.18
  6. Step 6: Final answer
    x = 11,717.16

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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.