Home / 11,425.96-15,767.71-6,390.12

Finding the Fourth Proportional to 11,425.96, 15,767.71 and 6,390.12

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Solution

The fourth proportional to 11,425.96, 15,767.71 and 6,390.12 is: 8,818.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,425.96 : 15,767.71 = 6,390.12 : x
  2. Step 2: Convert to fraction form
    11,425.96/15,767.71 = 6,390.12/x
  3. Step 3: Cross multiply
    11,425.96x = 15,767.71 × 6,390.12
  4. Step 4: Simplify right side
    11,425.96x = 100,757,559.03
  5. Step 5: Solve for x
    x = 100,757,559.03/11,425.96
  6. Step 6: Final answer
    x = 8,818.30

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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.