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Finding the Fourth Proportional to 9,191.79, 12,684.78 and 6,888.11

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Solution

The fourth proportional to 9,191.79, 12,684.78 and 6,888.11 is: 9,505.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,191.79 : 12,684.78 = 6,888.11 : x
  2. Step 2: Convert to fraction form
    9,191.79/12,684.78 = 6,888.11/x
  3. Step 3: Cross multiply
    9,191.79x = 12,684.78 × 6,888.11
  4. Step 4: Simplify right side
    9,191.79x = 87,374,096.54
  5. Step 5: Solve for x
    x = 87,374,096.54/9,191.79
  6. Step 6: Final answer
    x = 9,505.67

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Double scale
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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.