Home / 31,112.60-46,640.86-21,120.74

Finding the Fourth Proportional to 31,112.60, 46,640.86 and 21,120.74

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Solution

The fourth proportional to 31,112.60, 46,640.86 and 21,120.74 is: 31,662.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,112.60 : 46,640.86 = 21,120.74 : x
  2. Step 2: Convert to fraction form
    31,112.60/46,640.86 = 21,120.74/x
  3. Step 3: Cross multiply
    31,112.60x = 46,640.86 × 21,120.74
  4. Step 4: Simplify right side
    31,112.60x = 985,089,191.43
  5. Step 5: Solve for x
    x = 985,089,191.43/31,112.60
  6. Step 6: Final answer
    x = 31,662.07

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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.