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Finding the Fourth Proportional to 7,879.79, 10,874.14 and 4,342.93

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Solution

The fourth proportional to 7,879.79, 10,874.14 and 4,342.93 is: 5,993.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,879.79 : 10,874.14 = 4,342.93 : x
  2. Step 2: Convert to fraction form
    7,879.79/10,874.14 = 4,342.93/x
  3. Step 3: Cross multiply
    7,879.79x = 10,874.14 × 4,342.93
  4. Step 4: Simplify right side
    7,879.79x = 47,225,590.79
  5. Step 5: Solve for x
    x = 47,225,590.79/7,879.79
  6. Step 6: Final answer
    x = 5,993.25

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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.