Home / 11,921.81-16,451.37-6,616.31

Finding the Fourth Proportional to 11,921.81, 16,451.37 and 6,616.31

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Solution

The fourth proportional to 11,921.81, 16,451.37 and 6,616.31 is: 9,130.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,921.81 : 16,451.37 = 6,616.31 : x
  2. Step 2: Convert to fraction form
    11,921.81/16,451.37 = 6,616.31/x
  3. Step 3: Cross multiply
    11,921.81x = 16,451.37 × 6,616.31
  4. Step 4: Simplify right side
    11,921.81x = 108,847,281.59
  5. Step 5: Solve for x
    x = 108,847,281.59/11,921.81
  6. Step 6: Final answer
    x = 9,130.10

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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.