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Finding the Fourth Proportional to 8,457.92, 12,686.88 and 3,264.32

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Solution

The fourth proportional to 8,457.92, 12,686.88 and 3,264.32 is: 4,896.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,457.92 : 12,686.88 = 3,264.32 : x
  2. Step 2: Convert to fraction form
    8,457.92/12,686.88 = 3,264.32/x
  3. Step 3: Cross multiply
    8,457.92x = 12,686.88 × 3,264.32
  4. Step 4: Simplify right side
    8,457.92x = 41,414,036.12
  5. Step 5: Solve for x
    x = 41,414,036.12/8,457.92
  6. Step 6: Final answer
    x = 4,896.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.