Home / 20,975.60-31,437.48-12,629.36

Finding the Fourth Proportional to 20,975.60, 31,437.48 and 12,629.36

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Solution

The fourth proportional to 20,975.60, 31,437.48 and 12,629.36 is: 18,928.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,975.60 : 31,437.48 = 12,629.36 : x
  2. Step 2: Convert to fraction form
    20,975.60/31,437.48 = 12,629.36/x
  3. Step 3: Cross multiply
    20,975.60x = 31,437.48 × 12,629.36
  4. Step 4: Simplify right side
    20,975.60x = 397,035,252.41
  5. Step 5: Solve for x
    x = 397,035,252.41/20,975.60
  6. Step 6: Final answer
    x = 18,928.43

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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.