Home / 20,804.31-31,204.89-12,908.43

Finding the Fourth Proportional to 20,804.31, 31,204.89 and 12,908.43

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Solution

The fourth proportional to 20,804.31, 31,204.89 and 12,908.43 is: 19,361.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,804.31 : 31,204.89 = 12,908.43 : x
  2. Step 2: Convert to fraction form
    20,804.31/31,204.89 = 12,908.43/x
  3. Step 3: Cross multiply
    20,804.31x = 31,204.89 × 12,908.43
  4. Step 4: Simplify right side
    20,804.31x = 402,806,138.22
  5. Step 5: Solve for x
    x = 402,806,138.22/20,804.31
  6. Step 6: Final answer
    x = 19,361.67

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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.