Home / 4,877.12-6,728.76-2,780.72

Finding the Fourth Proportional to 4,877.12, 6,728.76 and 2,780.72

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Solution

The fourth proportional to 4,877.12, 6,728.76 and 2,780.72 is: 3,836.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,877.12 : 6,728.76 = 2,780.72 : x
  2. Step 2: Convert to fraction form
    4,877.12/6,728.76 = 2,780.72/x
  3. Step 3: Cross multiply
    4,877.12x = 6,728.76 × 2,780.72
  4. Step 4: Simplify right side
    4,877.12x = 18,710,797.51
  5. Step 5: Solve for x
    x = 18,710,797.51/4,877.12
  6. Step 6: Final answer
    x = 3,836.44

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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.