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Finding the Fourth Proportional to 7,108.88, 9,810.29 and 3,922.21

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Solution

The fourth proportional to 7,108.88, 9,810.29 and 3,922.21 is: 5,412.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,108.88 : 9,810.29 = 3,922.21 : x
  2. Step 2: Convert to fraction form
    7,108.88/9,810.29 = 3,922.21/x
  3. Step 3: Cross multiply
    7,108.88x = 9,810.29 × 3,922.21
  4. Step 4: Simplify right side
    7,108.88x = 38,477,997.93
  5. Step 5: Solve for x
    x = 38,477,997.93/7,108.88
  6. Step 6: Final answer
    x = 5,412.67

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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.