Home / 21,147.57-31,735.95-20,983.56

Finding the Fourth Proportional to 21,147.57, 31,735.95 and 20,983.56

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Solution

The fourth proportional to 21,147.57, 31,735.95 and 20,983.56 is: 31,489.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,147.57 : 31,735.95 = 20,983.56 : x
  2. Step 2: Convert to fraction form
    21,147.57/31,735.95 = 20,983.56/x
  3. Step 3: Cross multiply
    21,147.57x = 31,735.95 × 20,983.56
  4. Step 4: Simplify right side
    21,147.57x = 665,933,210.98
  5. Step 5: Solve for x
    x = 665,933,210.98/21,147.57
  6. Step 6: Final answer
    x = 31,489.82

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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.