Home / 15,778.32-21,774.31-8,704.90

Finding the Fourth Proportional to 15,778.32, 21,774.31 and 8,704.90

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Solution

The fourth proportional to 15,778.32, 21,774.31 and 8,704.90 is: 12,012.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,778.32 : 21,774.31 = 8,704.90 : x
  2. Step 2: Convert to fraction form
    15,778.32/21,774.31 = 8,704.90/x
  3. Step 3: Cross multiply
    15,778.32x = 21,774.31 × 8,704.90
  4. Step 4: Simplify right side
    15,778.32x = 189,543,191.12
  5. Step 5: Solve for x
    x = 189,543,191.12/15,778.32
  6. Step 6: Final answer
    x = 12,012.89

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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.