Home / 18,879.06-28,300.90-6,390.35

Finding the Fourth Proportional to 18,879.06, 28,300.90 and 6,390.35

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Solution

The fourth proportional to 18,879.06, 28,300.90 and 6,390.35 is: 9,579.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,879.06 : 28,300.90 = 6,390.35 : x
  2. Step 2: Convert to fraction form
    18,879.06/28,300.90 = 6,390.35/x
  3. Step 3: Cross multiply
    18,879.06x = 28,300.90 × 6,390.35
  4. Step 4: Simplify right side
    18,879.06x = 180,852,656.32
  5. Step 5: Solve for x
    x = 180,852,656.32/18,879.06
  6. Step 6: Final answer
    x = 9,579.54

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.