Home / 7,878.60-10,874.70-5,521.32

Finding the Fourth Proportional to 7,878.60, 10,874.70 and 5,521.32

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Solution

The fourth proportional to 7,878.60, 10,874.70 and 5,521.32 is: 7,620.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,878.60 : 10,874.70 = 5,521.32 : x
  2. Step 2: Convert to fraction form
    7,878.60/10,874.70 = 5,521.32/x
  3. Step 3: Cross multiply
    7,878.60x = 10,874.70 × 5,521.32
  4. Step 4: Simplify right side
    7,878.60x = 60,042,698.60
  5. Step 5: Solve for x
    x = 60,042,698.60/7,878.60
  6. Step 6: Final answer
    x = 7,620.99

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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.