Home / 28,370.55-42,555.79-8,380.32

Finding the Fourth Proportional to 28,370.55, 42,555.79 and 8,380.32

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Solution

The fourth proportional to 28,370.55, 42,555.79 and 8,380.32 is: 12,570.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,370.55 : 42,555.79 = 8,380.32 : x
  2. Step 2: Convert to fraction form
    28,370.55/42,555.79 = 8,380.32/x
  3. Step 3: Cross multiply
    28,370.55x = 42,555.79 × 8,380.32
  4. Step 4: Simplify right side
    28,370.55x = 356,631,138.05
  5. Step 5: Solve for x
    x = 356,631,138.05/28,370.55
  6. Step 6: Final answer
    x = 12,570.47

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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.