Home / 21,071.30-31,611.57-7,923.68

Finding the Fourth Proportional to 21,071.30, 31,611.57 and 7,923.68

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Solution

The fourth proportional to 21,071.30, 31,611.57 and 7,923.68 is: 11,887.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,071.30 : 31,611.57 = 7,923.68 : x
  2. Step 2: Convert to fraction form
    21,071.30/31,611.57 = 7,923.68/x
  3. Step 3: Cross multiply
    21,071.30x = 31,611.57 × 7,923.68
  4. Step 4: Simplify right side
    21,071.30x = 250,479,806.92
  5. Step 5: Solve for x
    x = 250,479,806.92/21,071.30
  6. Step 6: Final answer
    x = 11,887.25

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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.