Home / 15,494.87-21,379.38-8,778.96

Finding the Fourth Proportional to 15,494.87, 21,379.38 and 8,778.96

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Solution

The fourth proportional to 15,494.87, 21,379.38 and 8,778.96 is: 12,112.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,494.87 : 21,379.38 = 8,778.96 : x
  2. Step 2: Convert to fraction form
    15,494.87/21,379.38 = 8,778.96/x
  3. Step 3: Cross multiply
    15,494.87x = 21,379.38 × 8,778.96
  4. Step 4: Simplify right side
    15,494.87x = 187,688,721.84
  5. Step 5: Solve for x
    x = 187,688,721.84/15,494.87
  6. Step 6: Final answer
    x = 12,112.96

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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.