Home / 5,415.66-8,123.55-1,905.77

Finding the Fourth Proportional to 5,415.66, 8,123.55 and 1,905.77

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Solution

The fourth proportional to 5,415.66, 8,123.55 and 1,905.77 is: 2,858.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,415.66 : 8,123.55 = 1,905.77 : x
  2. Step 2: Convert to fraction form
    5,415.66/8,123.55 = 1,905.77/x
  3. Step 3: Cross multiply
    5,415.66x = 8,123.55 × 1,905.77
  4. Step 4: Simplify right side
    5,415.66x = 15,481,597.57
  5. Step 5: Solve for x
    x = 15,481,597.57/5,415.66
  6. Step 6: Final answer
    x = 2,858.68

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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.