Home / 7,878.21-10,872.17-4,341.65

Finding the Fourth Proportional to 7,878.21, 10,872.17 and 4,341.65

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Solution

The fourth proportional to 7,878.21, 10,872.17 and 4,341.65 is: 5,991.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,878.21 : 10,872.17 = 4,341.65 : x
  2. Step 2: Convert to fraction form
    7,878.21/10,872.17 = 4,341.65/x
  3. Step 3: Cross multiply
    7,878.21x = 10,872.17 × 4,341.65
  4. Step 4: Simplify right side
    7,878.21x = 47,203,135.17
  5. Step 5: Solve for x
    x = 47,203,135.17/7,878.21
  6. Step 6: Final answer
    x = 5,991.61

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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.