Home / 31,724.40-43,779-18,295.60

Finding the Fourth Proportional to 31,724.40, 43,779 and 18,295.60

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Solution

The fourth proportional to 31,724.40, 43,779 and 18,295.60 is: 25,247.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,724.40 : 43,779 = 18,295.60 : x
  2. Step 2: Convert to fraction form
    31,724.40/43,779 = 18,295.60/x
  3. Step 3: Cross multiply
    31,724.40x = 43,779 × 18,295.60
  4. Step 4: Simplify right side
    31,724.40x = 800,963,072.40
  5. Step 5: Solve for x
    x = 800,963,072.40/31,724.40
  6. Step 6: Final answer
    x = 25,247.54

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.