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Finding the Fourth Proportional to 7,108.76, 9,810.29 and 3,964.88

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Solution

The fourth proportional to 7,108.76, 9,810.29 and 3,964.88 is: 5,471.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,108.76 : 9,810.29 = 3,964.88 : x
  2. Step 2: Convert to fraction form
    7,108.76/9,810.29 = 3,964.88/x
  3. Step 3: Cross multiply
    7,108.76x = 9,810.29 × 3,964.88
  4. Step 4: Simplify right side
    7,108.76x = 38,896,583.48
  5. Step 5: Solve for x
    x = 38,896,583.48/7,108.76
  6. Step 6: Final answer
    x = 5,471.64

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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.