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Finding the Fourth Proportional to 7,887.30, 10,879.02 and 6,395.28

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Solution

The fourth proportional to 7,887.30, 10,879.02 and 6,395.28 is: 8,821.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,887.30 : 10,879.02 = 6,395.28 : x
  2. Step 2: Convert to fraction form
    7,887.30/10,879.02 = 6,395.28/x
  3. Step 3: Cross multiply
    7,887.30x = 10,879.02 × 6,395.28
  4. Step 4: Simplify right side
    7,887.30x = 69,574,379.03
  5. Step 5: Solve for x
    x = 69,574,379.03/7,887.30
  6. Step 6: Final answer
    x = 8,821.06

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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.