Home / 31,809.94-47,731.31-13,103.80

Finding the Fourth Proportional to 31,809.94, 47,731.31 and 13,103.80

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Solution

The fourth proportional to 31,809.94, 47,731.31 and 13,103.80 is: 19,662.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,809.94 : 47,731.31 = 13,103.80 : x
  2. Step 2: Convert to fraction form
    31,809.94/47,731.31 = 13,103.80/x
  3. Step 3: Cross multiply
    31,809.94x = 47,731.31 × 13,103.80
  4. Step 4: Simplify right side
    31,809.94x = 625,461,539.98
  5. Step 5: Solve for x
    x = 625,461,539.98/31,809.94
  6. Step 6: Final answer
    x = 19,662.46

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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.