Home / 20,856.08-28,774.20-11,897.12

Finding the Fourth Proportional to 20,856.08, 28,774.20 and 11,897.12

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Solution

The fourth proportional to 20,856.08, 28,774.20 and 11,897.12 is: 16,413.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,856.08 : 28,774.20 = 11,897.12 : x
  2. Step 2: Convert to fraction form
    20,856.08/28,774.20 = 11,897.12/x
  3. Step 3: Cross multiply
    20,856.08x = 28,774.20 × 11,897.12
  4. Step 4: Simplify right side
    20,856.08x = 342,330,110.30
  5. Step 5: Solve for x
    x = 342,330,110.30/20,856.08
  6. Step 6: Final answer
    x = 16,413.92

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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.