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Finding the Fourth Proportional to 18,730.20, 28,097.04 and 4,879.20

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Solution

The fourth proportional to 18,730.20, 28,097.04 and 4,879.20 is: 7,319.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,730.20 : 28,097.04 = 4,879.20 : x
  2. Step 2: Convert to fraction form
    18,730.20/28,097.04 = 4,879.20/x
  3. Step 3: Cross multiply
    18,730.20x = 28,097.04 × 4,879.20
  4. Step 4: Simplify right side
    18,730.20x = 137,091,077.57
  5. Step 5: Solve for x
    x = 137,091,077.57/18,730.20
  6. Step 6: Final answer
    x = 7,319.25

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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.