Home / 54,255.09-81,388.06-18,711.72

Finding the Fourth Proportional to 54,255.09, 81,388.06 and 18,711.72

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Solution

The fourth proportional to 54,255.09, 81,388.06 and 18,711.72 is: 28,069.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,255.09 : 81,388.06 = 18,711.72 : x
  2. Step 2: Convert to fraction form
    54,255.09/81,388.06 = 18,711.72/x
  3. Step 3: Cross multiply
    54,255.09x = 81,388.06 × 18,711.72
  4. Step 4: Simplify right side
    54,255.09x = 1,522,910,590.06
  5. Step 5: Solve for x
    x = 1,522,910,590.06/54,255.09
  6. Step 6: Final answer
    x = 28,069.45

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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.