Home / 3,897.08-5,377.98-2,128.69

Finding the Fourth Proportional to 3,897.08, 5,377.98 and 2,128.69

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Solution

The fourth proportional to 3,897.08, 5,377.98 and 2,128.69 is: 2,937.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,897.08 : 5,377.98 = 2,128.69 : x
  2. Step 2: Convert to fraction form
    3,897.08/5,377.98 = 2,128.69/x
  3. Step 3: Cross multiply
    3,897.08x = 5,377.98 × 2,128.69
  4. Step 4: Simplify right side
    3,897.08x = 11,448,052.25
  5. Step 5: Solve for x
    x = 11,448,052.25/3,897.08
  6. Step 6: Final answer
    x = 2,937.60

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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.