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Finding the Fourth Proportional to 21,002.68, 28,981.02 and 12,050.56

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Solution

The fourth proportional to 21,002.68, 28,981.02 and 12,050.56 is: 16,628.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,002.68 : 28,981.02 = 12,050.56 : x
  2. Step 2: Convert to fraction form
    21,002.68/28,981.02 = 12,050.56/x
  3. Step 3: Cross multiply
    21,002.68x = 28,981.02 × 12,050.56
  4. Step 4: Simplify right side
    21,002.68x = 349,237,520.37
  5. Step 5: Solve for x
    x = 349,237,520.37/21,002.68
  6. Step 6: Final answer
    x = 16,628.24

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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.