Home / 2,721.69-3,755.85-1,587.28

Finding the Fourth Proportional to 2,721.69, 3,755.85 and 1,587.28

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Solution

The fourth proportional to 2,721.69, 3,755.85 and 1,587.28 is: 2,190.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,721.69 : 3,755.85 = 1,587.28 : x
  2. Step 2: Convert to fraction form
    2,721.69/3,755.85 = 1,587.28/x
  3. Step 3: Cross multiply
    2,721.69x = 3,755.85 × 1,587.28
  4. Step 4: Simplify right side
    2,721.69x = 5,961,585.59
  5. Step 5: Solve for x
    x = 5,961,585.59/2,721.69
  6. Step 6: Final answer
    x = 2,190.40

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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.