Home / 7,878.24-10,839.72-6,285.72

Finding the Fourth Proportional to 7,878.24, 10,839.72 and 6,285.72

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Solution

The fourth proportional to 7,878.24, 10,839.72 and 6,285.72 is: 8,648.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,878.24 : 10,839.72 = 6,285.72 : x
  2. Step 2: Convert to fraction form
    7,878.24/10,839.72 = 6,285.72/x
  3. Step 3: Cross multiply
    7,878.24x = 10,839.72 × 6,285.72
  4. Step 4: Simplify right side
    7,878.24x = 68,135,444.80
  5. Step 5: Solve for x
    x = 68,135,444.80/7,878.24
  6. Step 6: Final answer
    x = 8,648.56

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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.