Home / 21,904.37-30,230.40-13,412.21

Finding the Fourth Proportional to 21,904.37, 30,230.40 and 13,412.21

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Solution

The fourth proportional to 21,904.37, 30,230.40 and 13,412.21 is: 18,510.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,904.37 : 30,230.40 = 13,412.21 : x
  2. Step 2: Convert to fraction form
    21,904.37/30,230.40 = 13,412.21/x
  3. Step 3: Cross multiply
    21,904.37x = 30,230.40 × 13,412.21
  4. Step 4: Simplify right side
    21,904.37x = 405,456,322.03
  5. Step 5: Solve for x
    x = 405,456,322.03/21,904.37
  6. Step 6: Final answer
    x = 18,510.30

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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.