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Finding the Fourth Proportional to 28,405.96, 42,609.06 and 8,684.44

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Solution

The fourth proportional to 28,405.96, 42,609.06 and 8,684.44 is: 13,026.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,405.96 : 42,609.06 = 8,684.44 : x
  2. Step 2: Convert to fraction form
    28,405.96/42,609.06 = 8,684.44/x
  3. Step 3: Cross multiply
    28,405.96x = 42,609.06 × 8,684.44
  4. Step 4: Simplify right side
    28,405.96x = 370,035,825.03
  5. Step 5: Solve for x
    x = 370,035,825.03/28,405.96
  6. Step 6: Final answer
    x = 13,026.70

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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.