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Finding the Fourth Proportional to 11,375.64, 15,698.88 and 6,340.14

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Solution

The fourth proportional to 11,375.64, 15,698.88 and 6,340.14 is: 8,749.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,375.64 : 15,698.88 = 6,340.14 : x
  2. Step 2: Convert to fraction form
    11,375.64/15,698.88 = 6,340.14/x
  3. Step 3: Cross multiply
    11,375.64x = 15,698.88 × 6,340.14
  4. Step 4: Simplify right side
    11,375.64x = 99,533,097.04
  5. Step 5: Solve for x
    x = 99,533,097.04/11,375.64
  6. Step 6: Final answer
    x = 8,749.67

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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.