Home / 20,665.01-28,518.60-12,709.86

Finding the Fourth Proportional to 20,665.01, 28,518.60 and 12,709.86

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Solution

The fourth proportional to 20,665.01, 28,518.60 and 12,709.86 is: 17,540.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,665.01 : 28,518.60 = 12,709.86 : x
  2. Step 2: Convert to fraction form
    20,665.01/28,518.60 = 12,709.86/x
  3. Step 3: Cross multiply
    20,665.01x = 28,518.60 × 12,709.86
  4. Step 4: Simplify right side
    20,665.01x = 362,467,413.40
  5. Step 5: Solve for x
    x = 362,467,413.40/20,665.01
  6. Step 6: Final answer
    x = 17,540.15

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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.