Home / 11,687.12-16,131.40-6,971.60

Finding the Fourth Proportional to 11,687.12, 16,131.40 and 6,971.60

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Solution

The fourth proportional to 11,687.12, 16,131.40 and 6,971.60 is: 9,622.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,687.12 : 16,131.40 = 6,971.60 : x
  2. Step 2: Convert to fraction form
    11,687.12/16,131.40 = 6,971.60/x
  3. Step 3: Cross multiply
    11,687.12x = 16,131.40 × 6,971.60
  4. Step 4: Simplify right side
    11,687.12x = 112,461,668.24
  5. Step 5: Solve for x
    x = 112,461,668.24/11,687.12
  6. Step 6: Final answer
    x = 9,622.70

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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.