Home / 5,385.15-8,072.84-1,921.59

Finding the Fourth Proportional to 5,385.15, 8,072.84 and 1,921.59

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Solution

The fourth proportional to 5,385.15, 8,072.84 and 1,921.59 is: 2,880.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,385.15 : 8,072.84 = 1,921.59 : x
  2. Step 2: Convert to fraction form
    5,385.15/8,072.84 = 1,921.59/x
  3. Step 3: Cross multiply
    5,385.15x = 8,072.84 × 1,921.59
  4. Step 4: Simplify right side
    5,385.15x = 15,512,688.62
  5. Step 5: Solve for x
    x = 15,512,688.62/5,385.15
  6. Step 6: Final answer
    x = 2,880.64

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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.