Home / 28,158.82-42,249.97-12,355.68

Finding the Fourth Proportional to 28,158.82, 42,249.97 and 12,355.68

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Solution

The fourth proportional to 28,158.82, 42,249.97 and 12,355.68 is: 18,538.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,158.82 : 42,249.97 = 12,355.68 : x
  2. Step 2: Convert to fraction form
    28,158.82/42,249.97 = 12,355.68/x
  3. Step 3: Cross multiply
    28,158.82x = 42,249.97 × 12,355.68
  4. Step 4: Simplify right side
    28,158.82x = 522,027,283.21
  5. Step 5: Solve for x
    x = 522,027,283.21/28,158.82
  6. Step 6: Final answer
    x = 18,538.68

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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.