Home / 11,945.36-16,484.28-6,640.40

Finding the Fourth Proportional to 11,945.36, 16,484.28 and 6,640.40

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Solution

The fourth proportional to 11,945.36, 16,484.28 and 6,640.40 is: 9,163.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,945.36 : 16,484.28 = 6,640.40 : x
  2. Step 2: Convert to fraction form
    11,945.36/16,484.28 = 6,640.40/x
  3. Step 3: Cross multiply
    11,945.36x = 16,484.28 × 6,640.40
  4. Step 4: Simplify right side
    11,945.36x = 109,462,212.91
  5. Step 5: Solve for x
    x = 109,462,212.91/11,945.36
  6. Step 6: Final answer
    x = 9,163.58

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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.