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Finding the Fourth Proportional to 11,375.84, 15,698.56 and 6,407.84

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Solution

The fourth proportional to 11,375.84, 15,698.56 and 6,407.84 is: 8,842.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,375.84 : 15,698.56 = 6,407.84 : x
  2. Step 2: Convert to fraction form
    11,375.84/15,698.56 = 6,407.84/x
  3. Step 3: Cross multiply
    11,375.84x = 15,698.56 × 6,407.84
  4. Step 4: Simplify right side
    11,375.84x = 100,593,860.71
  5. Step 5: Solve for x
    x = 100,593,860.71/11,375.84
  6. Step 6: Final answer
    x = 8,842.76

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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.