Home / 3,890.30-5,368.14-2,211.71

Finding the Fourth Proportional to 3,890.30, 5,368.14 and 2,211.71

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Solution

The fourth proportional to 3,890.30, 5,368.14 and 2,211.71 is: 3,051.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,890.30 : 5,368.14 = 2,211.71 : x
  2. Step 2: Convert to fraction form
    3,890.30/5,368.14 = 2,211.71/x
  3. Step 3: Cross multiply
    3,890.30x = 5,368.14 × 2,211.71
  4. Step 4: Simplify right side
    3,890.30x = 11,872,742.08
  5. Step 5: Solve for x
    x = 11,872,742.08/3,890.30
  6. Step 6: Final answer
    x = 3,051.89

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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.