Home / 21,323.21-31,943.26-12,982.55

Finding the Fourth Proportional to 21,323.21, 31,943.26 and 12,982.55

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Solution

The fourth proportional to 21,323.21, 31,943.26 and 12,982.55 is: 19,448.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,323.21 : 31,943.26 = 12,982.55 : x
  2. Step 2: Convert to fraction form
    21,323.21/31,943.26 = 12,982.55/x
  3. Step 3: Cross multiply
    21,323.21x = 31,943.26 × 12,982.55
  4. Step 4: Simplify right side
    21,323.21x = 414,704,777.94
  5. Step 5: Solve for x
    x = 414,704,777.94/21,323.21
  6. Step 6: Final answer
    x = 19,448.51

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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.