Home / 3,827.40-5,281.78-2,148.80

Finding the Fourth Proportional to 3,827.40, 5,281.78 and 2,148.80

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Solution

The fourth proportional to 3,827.40, 5,281.78 and 2,148.80 is: 2,965.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,827.40 : 5,281.78 = 2,148.80 : x
  2. Step 2: Convert to fraction form
    3,827.40/5,281.78 = 2,148.80/x
  3. Step 3: Cross multiply
    3,827.40x = 5,281.78 × 2,148.80
  4. Step 4: Simplify right side
    3,827.40x = 11,349,488.86
  5. Step 5: Solve for x
    x = 11,349,488.86/3,827.40
  6. Step 6: Final answer
    x = 2,965.33

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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.