Home / 18,879.04-28,339.08-10,990.18

Finding the Fourth Proportional to 18,879.04, 28,339.08 and 10,990.18

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Solution

The fourth proportional to 18,879.04, 28,339.08 and 10,990.18 is: 16,497.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,879.04 : 28,339.08 = 10,990.18 : x
  2. Step 2: Convert to fraction form
    18,879.04/28,339.08 = 10,990.18/x
  3. Step 3: Cross multiply
    18,879.04x = 28,339.08 × 10,990.18
  4. Step 4: Simplify right side
    18,879.04x = 311,451,590.23
  5. Step 5: Solve for x
    x = 311,451,590.23/18,879.04
  6. Step 6: Final answer
    x = 16,497.22

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1.5x scale

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.