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Finding the Fourth Proportional to 21,015, 29,004.96 and 12,068.67

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Solution

The fourth proportional to 21,015, 29,004.96 and 12,068.67 is: 16,657.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,015 : 29,004.96 = 12,068.67 : x
  2. Step 2: Convert to fraction form
    21,015/29,004.96 = 12,068.67/x
  3. Step 3: Cross multiply
    21,015x = 29,004.96 × 12,068.67
  4. Step 4: Simplify right side
    21,015x = 350,051,290.60
  5. Step 5: Solve for x
    x = 350,051,290.60/21,015
  6. Step 6: Final answer
    x = 16,657.21

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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.