Home / 21,131.74-31,702.61-6,900.14

Finding the Fourth Proportional to 21,131.74, 31,702.61 and 6,900.14

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Solution

The fourth proportional to 21,131.74, 31,702.61 and 6,900.14 is: 10,351.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,131.74 : 31,702.61 = 6,900.14 : x
  2. Step 2: Convert to fraction form
    21,131.74/31,702.61 = 6,900.14/x
  3. Step 3: Cross multiply
    21,131.74x = 31,702.61 × 6,900.14
  4. Step 4: Simplify right side
    21,131.74x = 218,752,447.37
  5. Step 5: Solve for x
    x = 218,752,447.37/21,131.74
  6. Step 6: Final answer
    x = 10,351.84

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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.