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Finding the Fourth Proportional to 53,993.70, 80,987.97 and 18,930.69

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Solution

The fourth proportional to 53,993.70, 80,987.97 and 18,930.69 is: 28,395.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,993.70 : 80,987.97 = 18,930.69 : x
  2. Step 2: Convert to fraction form
    53,993.70/80,987.97 = 18,930.69/x
  3. Step 3: Cross multiply
    53,993.70x = 80,987.97 × 18,930.69
  4. Step 4: Simplify right side
    53,993.70x = 1,533,158,153.80
  5. Step 5: Solve for x
    x = 1,533,158,153.80/53,993.70
  6. Step 6: Final answer
    x = 28,395.13

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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.