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Finding the Fourth Proportional to 28,571.91, 39,392.64 and 22,187.69

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Solution

The fourth proportional to 28,571.91, 39,392.64 and 22,187.69 is: 30,590.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,571.91 : 39,392.64 = 22,187.69 : x
  2. Step 2: Convert to fraction form
    28,571.91/39,392.64 = 22,187.69/x
  3. Step 3: Cross multiply
    28,571.91x = 39,392.64 × 22,187.69
  4. Step 4: Simplify right side
    28,571.91x = 874,031,783.08
  5. Step 5: Solve for x
    x = 874,031,783.08/28,571.91
  6. Step 6: Final answer
    x = 30,590.60

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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.