Home / 20,956.23-28,908.45-15,912.09

Finding the Fourth Proportional to 20,956.23, 28,908.45 and 15,912.09

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Solution

The fourth proportional to 20,956.23, 28,908.45 and 15,912.09 is: 21,950.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,956.23 : 28,908.45 = 15,912.09 : x
  2. Step 2: Convert to fraction form
    20,956.23/28,908.45 = 15,912.09/x
  3. Step 3: Cross multiply
    20,956.23x = 28,908.45 × 15,912.09
  4. Step 4: Simplify right side
    20,956.23x = 459,993,858.16
  5. Step 5: Solve for x
    x = 459,993,858.16/20,956.23
  6. Step 6: Final answer
    x = 21,950.22

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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.