Home / 4,905.36-6,768.98-2,780.40

Finding the Fourth Proportional to 4,905.36, 6,768.98 and 2,780.40

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Solution

The fourth proportional to 4,905.36, 6,768.98 and 2,780.40 is: 3,836.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,905.36 : 6,768.98 = 2,780.40 : x
  2. Step 2: Convert to fraction form
    4,905.36/6,768.98 = 2,780.40/x
  3. Step 3: Cross multiply
    4,905.36x = 6,768.98 × 2,780.40
  4. Step 4: Simplify right side
    4,905.36x = 18,820,493.90
  5. Step 5: Solve for x
    x = 18,820,493.90/4,905.36
  6. Step 6: Final answer
    x = 3,836.72

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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.