Home / 13,320.36-19,983.60-6,660.72

Finding the Fourth Proportional to 13,320.36, 19,983.60 and 6,660.72

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Solution

The fourth proportional to 13,320.36, 19,983.60 and 6,660.72 is: 9,992.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,320.36 : 19,983.60 = 6,660.72 : x
  2. Step 2: Convert to fraction form
    13,320.36/19,983.60 = 6,660.72/x
  3. Step 3: Cross multiply
    13,320.36x = 19,983.60 × 6,660.72
  4. Step 4: Simplify right side
    13,320.36x = 133,105,164.19
  5. Step 5: Solve for x
    x = 133,105,164.19/13,320.36
  6. Step 6: Final answer
    x = 9,992.61

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.