Home / 21,754.40-30,021.03-13,256.51

Finding the Fourth Proportional to 21,754.40, 30,021.03 and 13,256.51

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Solution

The fourth proportional to 21,754.40, 30,021.03 and 13,256.51 is: 18,293.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,754.40 : 30,021.03 = 13,256.51 : x
  2. Step 2: Convert to fraction form
    21,754.40/30,021.03 = 13,256.51/x
  3. Step 3: Cross multiply
    21,754.40x = 30,021.03 × 13,256.51
  4. Step 4: Simplify right side
    21,754.40x = 397,973,934.30
  5. Step 5: Solve for x
    x = 397,973,934.30/21,754.40
  6. Step 6: Final answer
    x = 18,293.96

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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.