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Finding the Fourth Proportional to 7,965.60, 10,992.60 and 4,428.72

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Solution

The fourth proportional to 7,965.60, 10,992.60 and 4,428.72 is: 6,111.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,965.60 : 10,992.60 = 4,428.72 : x
  2. Step 2: Convert to fraction form
    7,965.60/10,992.60 = 4,428.72/x
  3. Step 3: Cross multiply
    7,965.60x = 10,992.60 × 4,428.72
  4. Step 4: Simplify right side
    7,965.60x = 48,683,147.47
  5. Step 5: Solve for x
    x = 48,683,147.47/7,965.60
  6. Step 6: Final answer
    x = 6,111.67

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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.