Home / 20,879.36-28,817.20-12,495.84

Finding the Fourth Proportional to 20,879.36, 28,817.20 and 12,495.84

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Solution

The fourth proportional to 20,879.36, 28,817.20 and 12,495.84 is: 17,246.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,879.36 : 28,817.20 = 12,495.84 : x
  2. Step 2: Convert to fraction form
    20,879.36/28,817.20 = 12,495.84/x
  3. Step 3: Cross multiply
    20,879.36x = 28,817.20 × 12,495.84
  4. Step 4: Simplify right side
    20,879.36x = 360,095,120.45
  5. Step 5: Solve for x
    x = 360,095,120.45/20,879.36
  6. Step 6: Final answer
    x = 17,246.46

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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.