Home / 11,895.50-16,415.79-7,179.79

Finding the Fourth Proportional to 11,895.50, 16,415.79 and 7,179.79

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Solution

The fourth proportional to 11,895.50, 16,415.79 and 7,179.79 is: 9,908.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,895.50 : 16,415.79 = 7,179.79 : x
  2. Step 2: Convert to fraction form
    11,895.50/16,415.79 = 7,179.79/x
  3. Step 3: Cross multiply
    11,895.50x = 16,415.79 × 7,179.79
  4. Step 4: Simplify right side
    11,895.50x = 117,861,842.81
  5. Step 5: Solve for x
    x = 117,861,842.81/11,895.50
  6. Step 6: Final answer
    x = 9,908.10

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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.