Home / 9,912.10-13,670.86-8,778.96

Finding the Fourth Proportional to 9,912.10, 13,670.86 and 8,778.96

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Solution

The fourth proportional to 9,912.10, 13,670.86 and 8,778.96 is: 12,108.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,912.10 : 13,670.86 = 8,778.96 : x
  2. Step 2: Convert to fraction form
    9,912.10/13,670.86 = 8,778.96/x
  3. Step 3: Cross multiply
    9,912.10x = 13,670.86 × 8,778.96
  4. Step 4: Simplify right side
    9,912.10x = 120,015,933.11
  5. Step 5: Solve for x
    x = 120,015,933.11/9,912.10
  6. Step 6: Final answer
    x = 12,108.02

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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.