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Finding the Fourth Proportional to 27,111.20, 40,623.60 and 20,112.80

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Solution

The fourth proportional to 27,111.20, 40,623.60 and 20,112.80 is: 30,137.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,111.20 : 40,623.60 = 20,112.80 : x
  2. Step 2: Convert to fraction form
    27,111.20/40,623.60 = 20,112.80/x
  3. Step 3: Cross multiply
    27,111.20x = 40,623.60 × 20,112.80
  4. Step 4: Simplify right side
    27,111.20x = 817,054,342.08
  5. Step 5: Solve for x
    x = 817,054,342.08/27,111.20
  6. Step 6: Final answer
    x = 30,137.15

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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.