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Finding the Fourth Proportional to 8,950.96, 13,405.65 and 8,639.57

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Solution

The fourth proportional to 8,950.96, 13,405.65 and 8,639.57 is: 12,939.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,950.96 : 13,405.65 = 8,639.57 : x
  2. Step 2: Convert to fraction form
    8,950.96/13,405.65 = 8,639.57/x
  3. Step 3: Cross multiply
    8,950.96x = 13,405.65 × 8,639.57
  4. Step 4: Simplify right side
    8,950.96x = 115,819,051.57
  5. Step 5: Solve for x
    x = 115,819,051.57/8,950.96
  6. Step 6: Final answer
    x = 12,939.29

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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.