Home / 3,688.19-5,089.39-2,115.95

Finding the Fourth Proportional to 3,688.19, 5,089.39 and 2,115.95

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Solution

The fourth proportional to 3,688.19, 5,089.39 and 2,115.95 is: 2,919.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,688.19 : 5,089.39 = 2,115.95 : x
  2. Step 2: Convert to fraction form
    3,688.19/5,089.39 = 2,115.95/x
  3. Step 3: Cross multiply
    3,688.19x = 5,089.39 × 2,115.95
  4. Step 4: Simplify right side
    3,688.19x = 10,768,894.77
  5. Step 5: Solve for x
    x = 10,768,894.77/3,688.19
  6. Step 6: Final answer
    x = 2,919.83

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.