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Finding the Fourth Proportional to 6,275.40, 8,665.56 and 3,921.56

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Solution

The fourth proportional to 6,275.40, 8,665.56 and 3,921.56 is: 5,415.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,275.40 : 8,665.56 = 3,921.56 : x
  2. Step 2: Convert to fraction form
    6,275.40/8,665.56 = 3,921.56/x
  3. Step 3: Cross multiply
    6,275.40x = 8,665.56 × 3,921.56
  4. Step 4: Simplify right side
    6,275.40x = 33,982,513.47
  5. Step 5: Solve for x
    x = 33,982,513.47/6,275.40
  6. Step 6: Final answer
    x = 5,415.19

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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.