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Finding the Fourth Proportional to 20,602.88, 28,436.68 and 12,106

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Solution

The fourth proportional to 20,602.88, 28,436.68 and 12,106 is: 16,709.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,602.88 : 28,436.68 = 12,106 : x
  2. Step 2: Convert to fraction form
    20,602.88/28,436.68 = 12,106/x
  3. Step 3: Cross multiply
    20,602.88x = 28,436.68 × 12,106
  4. Step 4: Simplify right side
    20,602.88x = 344,254,448.08
  5. Step 5: Solve for x
    x = 344,254,448.08/20,602.88
  6. Step 6: Final answer
    x = 16,709.04

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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.