Home / 21,842.55-30,121.92-14,286.51

Finding the Fourth Proportional to 21,842.55, 30,121.92 and 14,286.51

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Solution

The fourth proportional to 21,842.55, 30,121.92 and 14,286.51 is: 19,701.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,842.55 : 30,121.92 = 14,286.51 : x
  2. Step 2: Convert to fraction form
    21,842.55/30,121.92 = 14,286.51/x
  3. Step 3: Cross multiply
    21,842.55x = 30,121.92 × 14,286.51
  4. Step 4: Simplify right side
    21,842.55x = 430,337,111.30
  5. Step 5: Solve for x
    x = 430,337,111.30/21,842.55
  6. Step 6: Final answer
    x = 19,701.78

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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.