Home / 21,198.94-31,637.40-20,340.67

Finding the Fourth Proportional to 21,198.94, 31,637.40 and 20,340.67

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Solution

The fourth proportional to 21,198.94, 31,637.40 and 20,340.67 is: 30,356.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,198.94 : 31,637.40 = 20,340.67 : x
  2. Step 2: Convert to fraction form
    21,198.94/31,637.40 = 20,340.67/x
  3. Step 3: Cross multiply
    21,198.94x = 31,637.40 × 20,340.67
  4. Step 4: Simplify right side
    21,198.94x = 643,525,833.96
  5. Step 5: Solve for x
    x = 643,525,833.96/21,198.94
  6. Step 6: Final answer
    x = 30,356.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.