Home / 11,170.05-15,415.90-6,390.43

Finding the Fourth Proportional to 11,170.05, 15,415.90 and 6,390.43

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Solution

The fourth proportional to 11,170.05, 15,415.90 and 6,390.43 is: 8,819.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,170.05 : 15,415.90 = 6,390.43 : x
  2. Step 2: Convert to fraction form
    11,170.05/15,415.90 = 6,390.43/x
  3. Step 3: Cross multiply
    11,170.05x = 15,415.90 × 6,390.43
  4. Step 4: Simplify right side
    11,170.05x = 98,514,229.84
  5. Step 5: Solve for x
    x = 98,514,229.84/11,170.05
  6. Step 6: Final answer
    x = 8,819.50

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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.