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Finding the Fourth Proportional to 7,108.16, 9,809.28 and 3,964.34

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Solution

The fourth proportional to 7,108.16, 9,809.28 and 3,964.34 is: 5,470.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,108.16 : 9,809.28 = 3,964.34 : x
  2. Step 2: Convert to fraction form
    7,108.16/9,809.28 = 3,964.34/x
  3. Step 3: Cross multiply
    7,108.16x = 9,809.28 × 3,964.34
  4. Step 4: Simplify right side
    7,108.16x = 38,887,321.08
  5. Step 5: Solve for x
    x = 38,887,321.08/7,108.16
  6. Step 6: Final answer
    x = 5,470.80

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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.