Home / 11,820.69-16,312.79-6,786.47

Finding the Fourth Proportional to 11,820.69, 16,312.79 and 6,786.47

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Solution

The fourth proportional to 11,820.69, 16,312.79 and 6,786.47 is: 9,365.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,820.69 : 16,312.79 = 6,786.47 : x
  2. Step 2: Convert to fraction form
    11,820.69/16,312.79 = 6,786.47/x
  3. Step 3: Cross multiply
    11,820.69x = 16,312.79 × 6,786.47
  4. Step 4: Simplify right side
    11,820.69x = 110,706,317.70
  5. Step 5: Solve for x
    x = 110,706,317.70/11,820.69
  6. Step 6: Final answer
    x = 9,365.47

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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.