Home / 11,821.05-16,312.31-6,515.91

Finding the Fourth Proportional to 11,821.05, 16,312.31 and 6,515.91

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Solution

The fourth proportional to 11,821.05, 16,312.31 and 6,515.91 is: 8,991.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,821.05 : 16,312.31 = 6,515.91 : x
  2. Step 2: Convert to fraction form
    11,821.05/16,312.31 = 6,515.91/x
  3. Step 3: Cross multiply
    11,821.05x = 16,312.31 × 6,515.91
  4. Step 4: Simplify right side
    11,821.05x = 106,289,511.27
  5. Step 5: Solve for x
    x = 106,289,511.27/11,821.05
  6. Step 6: Final answer
    x = 8,991.55

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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.