Home / 21,322.46-31,942.13-12,981.80

Finding the Fourth Proportional to 21,322.46, 31,942.13 and 12,981.80

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Solution

The fourth proportional to 21,322.46, 31,942.13 and 12,981.80 is: 19,447.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,322.46 : 31,942.13 = 12,981.80 : x
  2. Step 2: Convert to fraction form
    21,322.46/31,942.13 = 12,981.80/x
  3. Step 3: Cross multiply
    21,322.46x = 31,942.13 × 12,981.80
  4. Step 4: Simplify right side
    21,322.46x = 414,666,215.98
  5. Step 5: Solve for x
    x = 414,666,215.98/21,322.46
  6. Step 6: Final answer
    x = 19,447.39

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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.