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Finding the Fourth Proportional to 20,610, 28,441.80 and 11,178.63

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Solution

The fourth proportional to 20,610, 28,441.80 and 11,178.63 is: 15,426.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,610 : 28,441.80 = 11,178.63 : x
  2. Step 2: Convert to fraction form
    20,610/28,441.80 = 11,178.63/x
  3. Step 3: Cross multiply
    20,610x = 28,441.80 × 11,178.63
  4. Step 4: Simplify right side
    20,610x = 317,940,358.73
  5. Step 5: Solve for x
    x = 317,940,358.73/20,610
  6. Step 6: Final answer
    x = 15,426.51

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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.