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Finding the Fourth Proportional to 20,420.78, 30,558.03 and 14,804.98

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Solution

The fourth proportional to 20,420.78, 30,558.03 and 14,804.98 is: 22,154.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,420.78 : 30,558.03 = 14,804.98 : x
  2. Step 2: Convert to fraction form
    20,420.78/30,558.03 = 14,804.98/x
  3. Step 3: Cross multiply
    20,420.78x = 30,558.03 × 14,804.98
  4. Step 4: Simplify right side
    20,420.78x = 452,410,891.08
  5. Step 5: Solve for x
    x = 452,410,891.08/20,420.78
  6. Step 6: Final answer
    x = 22,154.44

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.