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Finding the Fourth Proportional to 11,425.94, 15,768.01 and 6,390.72

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Solution

The fourth proportional to 11,425.94, 15,768.01 and 6,390.72 is: 8,819.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,425.94 : 15,768.01 = 6,390.72 : x
  2. Step 2: Convert to fraction form
    11,425.94/15,768.01 = 6,390.72/x
  3. Step 3: Cross multiply
    11,425.94x = 15,768.01 × 6,390.72
  4. Step 4: Simplify right side
    11,425.94x = 100,768,936.87
  5. Step 5: Solve for x
    x = 100,768,936.87/11,425.94
  6. Step 6: Final answer
    x = 8,819.31

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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.