Home / 9,117.72-13,678.42-2,878.70

Finding the Fourth Proportional to 9,117.72, 13,678.42 and 2,878.70

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Solution

The fourth proportional to 9,117.72, 13,678.42 and 2,878.70 is: 4,318.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,117.72 : 13,678.42 = 2,878.70 : x
  2. Step 2: Convert to fraction form
    9,117.72/13,678.42 = 2,878.70/x
  3. Step 3: Cross multiply
    9,117.72x = 13,678.42 × 2,878.70
  4. Step 4: Simplify right side
    9,117.72x = 39,376,067.65
  5. Step 5: Solve for x
    x = 39,376,067.65/9,117.72
  6. Step 6: Final answer
    x = 4,318.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.