Home / 20,506.84-28,286.31-12,939.82

Finding the Fourth Proportional to 20,506.84, 28,286.31 and 12,939.82

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Solution

The fourth proportional to 20,506.84, 28,286.31 and 12,939.82 is: 17,848.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,506.84 : 28,286.31 = 12,939.82 : x
  2. Step 2: Convert to fraction form
    20,506.84/28,286.31 = 12,939.82/x
  3. Step 3: Cross multiply
    20,506.84x = 28,286.31 × 12,939.82
  4. Step 4: Simplify right side
    20,506.84x = 366,019,737.67
  5. Step 5: Solve for x
    x = 366,019,737.67/20,506.84
  6. Step 6: Final answer
    x = 17,848.67

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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.