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Finding the Fourth Proportional to 30,884.68, 42,620.04 and 18,137.68

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Solution

The fourth proportional to 30,884.68, 42,620.04 and 18,137.68 is: 25,029.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,884.68 : 42,620.04 = 18,137.68 : x
  2. Step 2: Convert to fraction form
    30,884.68/42,620.04 = 18,137.68/x
  3. Step 3: Cross multiply
    30,884.68x = 42,620.04 × 18,137.68
  4. Step 4: Simplify right side
    30,884.68x = 773,028,647.11
  5. Step 5: Solve for x
    x = 773,028,647.11/30,884.68
  6. Step 6: Final answer
    x = 25,029.52

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1.5x scale

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.