Home / 21,030.44-31,481.24-13,620.15

Finding the Fourth Proportional to 21,030.44, 31,481.24 and 13,620.15

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Solution

The fourth proportional to 21,030.44, 31,481.24 and 13,620.15 is: 20,388.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,030.44 : 31,481.24 = 13,620.15 : x
  2. Step 2: Convert to fraction form
    21,030.44/31,481.24 = 13,620.15/x
  3. Step 3: Cross multiply
    21,030.44x = 31,481.24 × 13,620.15
  4. Step 4: Simplify right side
    21,030.44x = 428,779,210.99
  5. Step 5: Solve for x
    x = 428,779,210.99/21,030.44
  6. Step 6: Final answer
    x = 20,388.51

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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.