Home / 4,678.50-7,018.91-1,391.58

Finding the Fourth Proportional to 4,678.50, 7,018.91 and 1,391.58

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Solution

The fourth proportional to 4,678.50, 7,018.91 and 1,391.58 is: 2,087.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,678.50 : 7,018.91 = 1,391.58 : x
  2. Step 2: Convert to fraction form
    4,678.50/7,018.91 = 1,391.58/x
  3. Step 3: Cross multiply
    4,678.50x = 7,018.91 × 1,391.58
  4. Step 4: Simplify right side
    4,678.50x = 9,767,367.82
  5. Step 5: Solve for x
    x = 9,767,367.82/4,678.50
  6. Step 6: Final answer
    x = 2,087.71

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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.