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Finding the Fourth Proportional to 6,639.81, 9,162.57 and 3,655.16

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Solution

The fourth proportional to 6,639.81, 9,162.57 and 3,655.16 is: 5,043.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,639.81 : 9,162.57 = 3,655.16 : x
  2. Step 2: Convert to fraction form
    6,639.81/9,162.57 = 3,655.16/x
  3. Step 3: Cross multiply
    6,639.81x = 9,162.57 × 3,655.16
  4. Step 4: Simplify right side
    6,639.81x = 33,490,659.36
  5. Step 5: Solve for x
    x = 33,490,659.36/6,639.81
  6. Step 6: Final answer
    x = 5,043.92

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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.