Home / 21,816.36-30,120.60-13,437.72

Finding the Fourth Proportional to 21,816.36, 30,120.60 and 13,437.72

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Solution

The fourth proportional to 21,816.36, 30,120.60 and 13,437.72 is: 18,552.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,816.36 : 30,120.60 = 13,437.72 : x
  2. Step 2: Convert to fraction form
    21,816.36/30,120.60 = 13,437.72/x
  3. Step 3: Cross multiply
    21,816.36x = 30,120.60 × 13,437.72
  4. Step 4: Simplify right side
    21,816.36x = 404,752,189.03
  5. Step 5: Solve for x
    x = 404,752,189.03/21,816.36
  6. Step 6: Final answer
    x = 18,552.69

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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.