Home / 21,905.86-30,232.46-13,413.70

Finding the Fourth Proportional to 21,905.86, 30,232.46 and 13,413.70

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Solution

The fourth proportional to 21,905.86, 30,232.46 and 13,413.70 is: 18,512.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,905.86 : 30,232.46 = 13,413.70 : x
  2. Step 2: Convert to fraction form
    21,905.86/30,232.46 = 13,413.70/x
  3. Step 3: Cross multiply
    21,905.86x = 30,232.46 × 13,413.70
  4. Step 4: Simplify right side
    21,905.86x = 405,529,148.70
  5. Step 5: Solve for x
    x = 405,529,148.70/21,905.86
  6. Step 6: Final answer
    x = 18,512.36

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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.