Home / 3,897.04-5,377.86-2,128.63

Finding the Fourth Proportional to 3,897.04, 5,377.86 and 2,128.63

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Solution

The fourth proportional to 3,897.04, 5,377.86 and 2,128.63 is: 2,937.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,897.04 : 5,377.86 = 2,128.63 : x
  2. Step 2: Convert to fraction form
    3,897.04/5,377.86 = 2,128.63/x
  3. Step 3: Cross multiply
    3,897.04x = 5,377.86 × 2,128.63
  4. Step 4: Simplify right side
    3,897.04x = 11,447,474.13
  5. Step 5: Solve for x
    x = 11,447,474.13/3,897.04
  6. Step 6: Final answer
    x = 2,937.48

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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.