Home / 7,878.77-10,872.21-4,521.86

Finding the Fourth Proportional to 7,878.77, 10,872.21 and 4,521.86

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Solution

The fourth proportional to 7,878.77, 10,872.21 and 4,521.86 is: 6,239.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,878.77 : 10,872.21 = 4,521.86 : x
  2. Step 2: Convert to fraction form
    7,878.77/10,872.21 = 4,521.86/x
  3. Step 3: Cross multiply
    7,878.77x = 10,872.21 × 4,521.86
  4. Step 4: Simplify right side
    7,878.77x = 49,162,611.51
  5. Step 5: Solve for x
    x = 49,162,611.51/7,878.77
  6. Step 6: Final answer
    x = 6,239.88

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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.