Home / 21,190.57-31,790.40-7,150.94

Finding the Fourth Proportional to 21,190.57, 31,790.40 and 7,150.94

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Solution

The fourth proportional to 21,190.57, 31,790.40 and 7,150.94 is: 10,727.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,190.57 : 31,790.40 = 7,150.94 : x
  2. Step 2: Convert to fraction form
    21,190.57/31,790.40 = 7,150.94/x
  3. Step 3: Cross multiply
    21,190.57x = 31,790.40 × 7,150.94
  4. Step 4: Simplify right side
    21,190.57x = 227,331,242.98
  5. Step 5: Solve for x
    x = 227,331,242.98/21,190.57
  6. Step 6: Final answer
    x = 10,727.95

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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.