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Finding the Fourth Proportional to 7,122.22, 9,821.12 and 4,887.36

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Solution

The fourth proportional to 7,122.22, 9,821.12 and 4,887.36 is: 6,739.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,122.22 : 9,821.12 = 4,887.36 : x
  2. Step 2: Convert to fraction form
    7,122.22/9,821.12 = 4,887.36/x
  3. Step 3: Cross multiply
    7,122.22x = 9,821.12 × 4,887.36
  4. Step 4: Simplify right side
    7,122.22x = 47,999,324.61
  5. Step 5: Solve for x
    x = 47,999,324.61/7,122.22
  6. Step 6: Final answer
    x = 6,739.38

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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.