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Finding the Fourth Proportional to 6,720.88, 9,275.40 and 3,927.28

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Solution

The fourth proportional to 6,720.88, 9,275.40 and 3,927.28 is: 5,419.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,720.88 : 9,275.40 = 3,927.28 : x
  2. Step 2: Convert to fraction form
    6,720.88/9,275.40 = 3,927.28/x
  3. Step 3: Cross multiply
    6,720.88x = 9,275.40 × 3,927.28
  4. Step 4: Simplify right side
    6,720.88x = 36,427,092.91
  5. Step 5: Solve for x
    x = 36,427,092.91/6,720.88
  6. Step 6: Final answer
    x = 5,419.99

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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.