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Finding the Fourth Proportional to 21,626.81, 29,846.18 and 12,068.81

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Solution

The fourth proportional to 21,626.81, 29,846.18 and 12,068.81 is: 16,655.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,626.81 : 29,846.18 = 12,068.81 : x
  2. Step 2: Convert to fraction form
    21,626.81/29,846.18 = 12,068.81/x
  3. Step 3: Cross multiply
    21,626.81x = 29,846.18 × 12,068.81
  4. Step 4: Simplify right side
    21,626.81x = 360,207,815.30
  5. Step 5: Solve for x
    x = 360,207,815.30/21,626.81
  6. Step 6: Final answer
    x = 16,655.61

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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.