Home / 15,778.49-21,774.26-8,704.91

Finding the Fourth Proportional to 15,778.49, 21,774.26 and 8,704.91

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Solution

The fourth proportional to 15,778.49, 21,774.26 and 8,704.91 is: 12,012.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,778.49 : 21,774.26 = 8,704.91 : x
  2. Step 2: Convert to fraction form
    15,778.49/21,774.26 = 8,704.91/x
  3. Step 3: Cross multiply
    15,778.49x = 21,774.26 × 8,704.91
  4. Step 4: Simplify right side
    15,778.49x = 189,543,049.81
  5. Step 5: Solve for x
    x = 189,543,049.81/15,778.49
  6. Step 6: Final answer
    x = 12,012.75

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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.