Home / 21,265.06-31,896.30-9,415.38

Finding the Fourth Proportional to 21,265.06, 31,896.30 and 9,415.38

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Solution

The fourth proportional to 21,265.06, 31,896.30 and 9,415.38 is: 14,122.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,265.06 : 31,896.30 = 9,415.38 : x
  2. Step 2: Convert to fraction form
    21,265.06/31,896.30 = 9,415.38/x
  3. Step 3: Cross multiply
    21,265.06x = 31,896.30 × 9,415.38
  4. Step 4: Simplify right side
    21,265.06x = 300,315,785.09
  5. Step 5: Solve for x
    x = 300,315,785.09/21,265.06
  6. Step 6: Final answer
    x = 14,122.50

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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.