Home / 15,778.23-21,774.21-8,704.65

Finding the Fourth Proportional to 15,778.23, 21,774.21 and 8,704.65

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Solution

The fourth proportional to 15,778.23, 21,774.21 and 8,704.65 is: 12,012.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,778.23 : 21,774.21 = 8,704.65 : x
  2. Step 2: Convert to fraction form
    15,778.23/21,774.21 = 8,704.65/x
  3. Step 3: Cross multiply
    15,778.23x = 21,774.21 × 8,704.65
  4. Step 4: Simplify right side
    15,778.23x = 189,536,877.08
  5. Step 5: Solve for x
    x = 189,536,877.08/15,778.23
  6. Step 6: Final answer
    x = 12,012.56

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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.