Home / 11,699.12-16,147.26-7,720.76

Finding the Fourth Proportional to 11,699.12, 16,147.26 and 7,720.76

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Solution

The fourth proportional to 11,699.12, 16,147.26 and 7,720.76 is: 10,656.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,699.12 : 16,147.26 = 7,720.76 : x
  2. Step 2: Convert to fraction form
    11,699.12/16,147.26 = 7,720.76/x
  3. Step 3: Cross multiply
    11,699.12x = 16,147.26 × 7,720.76
  4. Step 4: Simplify right side
    11,699.12x = 124,669,119.12
  5. Step 5: Solve for x
    x = 124,669,119.12/11,699.12
  6. Step 6: Final answer
    x = 10,656.28

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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.