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Finding the Fourth Proportional to 8,428.79, 12,643.18 and 2,272.79

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Solution

The fourth proportional to 8,428.79, 12,643.18 and 2,272.79 is: 3,409.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,428.79 : 12,643.18 = 2,272.79 : x
  2. Step 2: Convert to fraction form
    8,428.79/12,643.18 = 2,272.79/x
  3. Step 3: Cross multiply
    8,428.79x = 12,643.18 × 2,272.79
  4. Step 4: Simplify right side
    8,428.79x = 28,735,319.00
  5. Step 5: Solve for x
    x = 28,735,319.00/8,428.79
  6. Step 6: Final answer
    x = 3,409.19

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Similar ratio
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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.