Home / 21,879.61-30,176.62-16,520.05

Finding the Fourth Proportional to 21,879.61, 30,176.62 and 16,520.05

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Solution

The fourth proportional to 21,879.61, 30,176.62 and 16,520.05 is: 22,784.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,879.61 : 30,176.62 = 16,520.05 : x
  2. Step 2: Convert to fraction form
    21,879.61/30,176.62 = 16,520.05/x
  3. Step 3: Cross multiply
    21,879.61x = 30,176.62 × 16,520.05
  4. Step 4: Simplify right side
    21,879.61x = 498,519,271.23
  5. Step 5: Solve for x
    x = 498,519,271.23/21,879.61
  6. Step 6: Final answer
    x = 22,784.65

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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.