Home / 5,415.39-8,123.04-2,129.40

Finding the Fourth Proportional to 5,415.39, 8,123.04 and 2,129.40

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Solution

The fourth proportional to 5,415.39, 8,123.04 and 2,129.40 is: 3,194.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,415.39 : 8,123.04 = 2,129.40 : x
  2. Step 2: Convert to fraction form
    5,415.39/8,123.04 = 2,129.40/x
  3. Step 3: Cross multiply
    5,415.39x = 8,123.04 × 2,129.40
  4. Step 4: Simplify right side
    5,415.39x = 17,297,201.38
  5. Step 5: Solve for x
    x = 17,297,201.38/5,415.39
  6. Step 6: Final answer
    x = 3,194.08

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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.