Home / 7,123.82-10,685.72-1,929.69

Finding the Fourth Proportional to 7,123.82, 10,685.72 and 1,929.69

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Solution

The fourth proportional to 7,123.82, 10,685.72 and 1,929.69 is: 2,894.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,123.82 : 10,685.72 = 1,929.69 : x
  2. Step 2: Convert to fraction form
    7,123.82/10,685.72 = 1,929.69/x
  3. Step 3: Cross multiply
    7,123.82x = 10,685.72 × 1,929.69
  4. Step 4: Simplify right side
    7,123.82x = 20,620,131.85
  5. Step 5: Solve for x
    x = 20,620,131.85/7,123.82
  6. Step 6: Final answer
    x = 2,894.54

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.