Home / 30,571.36-42,152.94-28,679.91

Finding the Fourth Proportional to 30,571.36, 42,152.94 and 28,679.91

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Solution

The fourth proportional to 30,571.36, 42,152.94 and 28,679.91 is: 39,544.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,571.36 : 42,152.94 = 28,679.91 : x
  2. Step 2: Convert to fraction form
    30,571.36/42,152.94 = 28,679.91/x
  3. Step 3: Cross multiply
    30,571.36x = 42,152.94 × 28,679.91
  4. Step 4: Simplify right side
    30,571.36x = 1,208,942,367.36
  5. Step 5: Solve for x
    x = 1,208,942,367.36/30,571.36
  6. Step 6: Final answer
    x = 39,544.94

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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.