Home / 11,715.31-16,169.84-7,179.36

Finding the Fourth Proportional to 11,715.31, 16,169.84 and 7,179.36

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Solution

The fourth proportional to 11,715.31, 16,169.84 and 7,179.36 is: 9,909.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,715.31 : 16,169.84 = 7,179.36 : x
  2. Step 2: Convert to fraction form
    11,715.31/16,169.84 = 7,179.36/x
  3. Step 3: Cross multiply
    11,715.31x = 16,169.84 × 7,179.36
  4. Step 4: Simplify right side
    11,715.31x = 116,089,102.50
  5. Step 5: Solve for x
    x = 116,089,102.50/11,715.31
  6. Step 6: Final answer
    x = 9,909.18

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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.