Home / 28,121.04-42,181.56-8,399.79

Finding the Fourth Proportional to 28,121.04, 42,181.56 and 8,399.79

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Solution

The fourth proportional to 28,121.04, 42,181.56 and 8,399.79 is: 12,599.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,121.04 : 42,181.56 = 8,399.79 : x
  2. Step 2: Convert to fraction form
    28,121.04/42,181.56 = 8,399.79/x
  3. Step 3: Cross multiply
    28,121.04x = 42,181.56 × 8,399.79
  4. Step 4: Simplify right side
    28,121.04x = 354,316,245.87
  5. Step 5: Solve for x
    x = 354,316,245.87/28,121.04
  6. Step 6: Final answer
    x = 12,599.69

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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.