Home / 5,415.94-8,123.55-2,129.59

Finding the Fourth Proportional to 5,415.94, 8,123.55 and 2,129.59

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Solution

The fourth proportional to 5,415.94, 8,123.55 and 2,129.59 is: 3,194.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,415.94 : 8,123.55 = 2,129.59 : x
  2. Step 2: Convert to fraction form
    5,415.94/8,123.55 = 2,129.59/x
  3. Step 3: Cross multiply
    5,415.94x = 8,123.55 × 2,129.59
  4. Step 4: Simplify right side
    5,415.94x = 17,299,830.84
  5. Step 5: Solve for x
    x = 17,299,830.84/5,415.94
  6. Step 6: Final answer
    x = 3,194.24

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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.