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Finding the Fourth Proportional to 21,003.50, 28,984.52 and 12,050.81

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Solution

The fourth proportional to 21,003.50, 28,984.52 and 12,050.81 is: 16,629.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,003.50 : 28,984.52 = 12,050.81 : x
  2. Step 2: Convert to fraction form
    21,003.50/28,984.52 = 12,050.81/x
  3. Step 3: Cross multiply
    21,003.50x = 28,984.52 × 12,050.81
  4. Step 4: Simplify right side
    21,003.50x = 349,286,828.67
  5. Step 5: Solve for x
    x = 349,286,828.67/21,003.50
  6. Step 6: Final answer
    x = 16,629.94

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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.