Home / 20,158.42-27,806.47-12,985.97

Finding the Fourth Proportional to 20,158.42, 27,806.47 and 12,985.97

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Solution

The fourth proportional to 20,158.42, 27,806.47 and 12,985.97 is: 17,912.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,158.42 : 27,806.47 = 12,985.97 : x
  2. Step 2: Convert to fraction form
    20,158.42/27,806.47 = 12,985.97/x
  3. Step 3: Cross multiply
    20,158.42x = 27,806.47 × 12,985.97
  4. Step 4: Simplify right side
    20,158.42x = 361,093,846.19
  5. Step 5: Solve for x
    x = 361,093,846.19/20,158.42
  6. Step 6: Final answer
    x = 17,912.81

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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.