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Finding the Fourth Proportional to 7,879.98, 10,879.87 and 4,897.16

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Solution

The fourth proportional to 7,879.98, 10,879.87 and 4,897.16 is: 6,761.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,879.98 : 10,879.87 = 4,897.16 : x
  2. Step 2: Convert to fraction form
    7,879.98/10,879.87 = 4,897.16/x
  3. Step 3: Cross multiply
    7,879.98x = 10,879.87 × 4,897.16
  4. Step 4: Simplify right side
    7,879.98x = 53,280,447.51
  5. Step 5: Solve for x
    x = 53,280,447.51/7,879.98
  6. Step 6: Final answer
    x = 6,761.49

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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.