Home / 11,921.16-16,450.47-6,615.66

Finding the Fourth Proportional to 11,921.16, 16,450.47 and 6,615.66

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Solution

The fourth proportional to 11,921.16, 16,450.47 and 6,615.66 is: 9,129.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,921.16 : 16,450.47 = 6,615.66 : x
  2. Step 2: Convert to fraction form
    11,921.16/16,450.47 = 6,615.66/x
  3. Step 3: Cross multiply
    11,921.16x = 16,450.47 × 6,615.66
  4. Step 4: Simplify right side
    11,921.16x = 108,830,716.36
  5. Step 5: Solve for x
    x = 108,830,716.36/11,921.16
  6. Step 6: Final answer
    x = 9,129.21

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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.