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Finding the Fourth Proportional to 9,358.56, 12,915.60 and 5,167.56

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Solution

The fourth proportional to 9,358.56, 12,915.60 and 5,167.56 is: 7,131.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,358.56 : 12,915.60 = 5,167.56 : x
  2. Step 2: Convert to fraction form
    9,358.56/12,915.60 = 5,167.56/x
  3. Step 3: Cross multiply
    9,358.56x = 12,915.60 × 5,167.56
  4. Step 4: Simplify right side
    9,358.56x = 66,742,137.94
  5. Step 5: Solve for x
    x = 66,742,137.94/9,358.56
  6. Step 6: Final answer
    x = 7,131.67

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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.