Home / 4,878.15-6,728.70-2,887.35

Finding the Fourth Proportional to 4,878.15, 6,728.70 and 2,887.35

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Solution

The fourth proportional to 4,878.15, 6,728.70 and 2,887.35 is: 3,982.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,878.15 : 6,728.70 = 2,887.35 : x
  2. Step 2: Convert to fraction form
    4,878.15/6,728.70 = 2,887.35/x
  3. Step 3: Cross multiply
    4,878.15x = 6,728.70 × 2,887.35
  4. Step 4: Simplify right side
    4,878.15x = 19,428,111.95
  5. Step 5: Solve for x
    x = 19,428,111.95/4,878.15
  6. Step 6: Final answer
    x = 3,982.68

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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.