Home / 20,951.08-28,911.54-11,999.32

Finding the Fourth Proportional to 20,951.08, 28,911.54 and 11,999.32

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Solution

The fourth proportional to 20,951.08, 28,911.54 and 11,999.32 is: 16,558.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,951.08 : 28,911.54 = 11,999.32 : x
  2. Step 2: Convert to fraction form
    20,951.08/28,911.54 = 11,999.32/x
  3. Step 3: Cross multiply
    20,951.08x = 28,911.54 × 11,999.32
  4. Step 4: Simplify right side
    20,951.08x = 346,918,820.15
  5. Step 5: Solve for x
    x = 346,918,820.15/20,951.08
  6. Step 6: Final answer
    x = 16,558.52

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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.