Home / 11,428.58-15,771.36-6,392.78

Finding the Fourth Proportional to 11,428.58, 15,771.36 and 6,392.78

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Solution

The fourth proportional to 11,428.58, 15,771.36 and 6,392.78 is: 8,821.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,428.58 : 15,771.36 = 6,392.78 : x
  2. Step 2: Convert to fraction form
    11,428.58/15,771.36 = 6,392.78/x
  3. Step 3: Cross multiply
    11,428.58x = 15,771.36 × 6,392.78
  4. Step 4: Simplify right side
    11,428.58x = 100,822,834.78
  5. Step 5: Solve for x
    x = 100,822,834.78/11,428.58
  6. Step 6: Final answer
    x = 8,821.99

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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.