Home / 11,820.50-16,315.43-6,979.47

Finding the Fourth Proportional to 11,820.50, 16,315.43 and 6,979.47

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Solution

The fourth proportional to 11,820.50, 16,315.43 and 6,979.47 is: 9,633.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,820.50 : 16,315.43 = 6,979.47 : x
  2. Step 2: Convert to fraction form
    11,820.50/16,315.43 = 6,979.47/x
  3. Step 3: Cross multiply
    11,820.50x = 16,315.43 × 6,979.47
  4. Step 4: Simplify right side
    11,820.50x = 113,872,958.14
  5. Step 5: Solve for x
    x = 113,872,958.14/11,820.50
  6. Step 6: Final answer
    x = 9,633.52

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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.