Home / 5,415.26-8,124.30-1,905.12

Finding the Fourth Proportional to 5,415.26, 8,124.30 and 1,905.12

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Solution

The fourth proportional to 5,415.26, 8,124.30 and 1,905.12 is: 2,858.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,415.26 : 8,124.30 = 1,905.12 : x
  2. Step 2: Convert to fraction form
    5,415.26/8,124.30 = 1,905.12/x
  3. Step 3: Cross multiply
    5,415.26x = 8,124.30 × 1,905.12
  4. Step 4: Simplify right side
    5,415.26x = 15,477,766.42
  5. Step 5: Solve for x
    x = 15,477,766.42/5,415.26
  6. Step 6: Final answer
    x = 2,858.18

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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.