Home / 20,725.60-31,112.70-12,413.20

Finding the Fourth Proportional to 20,725.60, 31,112.70 and 12,413.20

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Solution

The fourth proportional to 20,725.60, 31,112.70 and 12,413.20 is: 18,634.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,725.60 : 31,112.70 = 12,413.20 : x
  2. Step 2: Convert to fraction form
    20,725.60/31,112.70 = 12,413.20/x
  3. Step 3: Cross multiply
    20,725.60x = 31,112.70 × 12,413.20
  4. Step 4: Simplify right side
    20,725.60x = 386,208,167.64
  5. Step 5: Solve for x
    x = 386,208,167.64/20,725.60
  6. Step 6: Final answer
    x = 18,634.35

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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.