Home / 21,883.20-30,190.24-13,485.12

Finding the Fourth Proportional to 21,883.20, 30,190.24 and 13,485.12

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Solution

The fourth proportional to 21,883.20, 30,190.24 and 13,485.12 is: 18,604.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,883.20 : 30,190.24 = 13,485.12 : x
  2. Step 2: Convert to fraction form
    21,883.20/30,190.24 = 13,485.12/x
  3. Step 3: Cross multiply
    21,883.20x = 30,190.24 × 13,485.12
  4. Step 4: Simplify right side
    21,883.20x = 407,119,009.23
  5. Step 5: Solve for x
    x = 407,119,009.23/21,883.20
  6. Step 6: Final answer
    x = 18,604.18

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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.