Home / 28,161.88-38,870.34-20,227.96

Finding the Fourth Proportional to 28,161.88, 38,870.34 and 20,227.96

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Solution

The fourth proportional to 28,161.88, 38,870.34 and 20,227.96 is: 27,919.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,161.88 : 38,870.34 = 20,227.96 : x
  2. Step 2: Convert to fraction form
    28,161.88/38,870.34 = 20,227.96/x
  3. Step 3: Cross multiply
    28,161.88x = 38,870.34 × 20,227.96
  4. Step 4: Simplify right side
    28,161.88x = 786,267,682.71
  5. Step 5: Solve for x
    x = 786,267,682.71/28,161.88
  6. Step 6: Final answer
    x = 27,919.57

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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.