Home / 11,431.16-15,764.46-8,778.68

Finding the Fourth Proportional to 11,431.16, 15,764.46 and 8,778.68

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Solution

The fourth proportional to 11,431.16, 15,764.46 and 8,778.68 is: 12,106.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,431.16 : 15,764.46 = 8,778.68 : x
  2. Step 2: Convert to fraction form
    11,431.16/15,764.46 = 8,778.68/x
  3. Step 3: Cross multiply
    11,431.16x = 15,764.46 × 8,778.68
  4. Step 4: Simplify right side
    11,431.16x = 138,391,149.71
  5. Step 5: Solve for x
    x = 138,391,149.71/11,431.16
  6. Step 6: Final answer
    x = 12,106.48

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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.