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Finding the Fourth Proportional to 7,289.28, 10,059.16 and 3,977.28

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Solution

The fourth proportional to 7,289.28, 10,059.16 and 3,977.28 is: 5,488.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,289.28 : 10,059.16 = 3,977.28 : x
  2. Step 2: Convert to fraction form
    7,289.28/10,059.16 = 3,977.28/x
  3. Step 3: Cross multiply
    7,289.28x = 10,059.16 × 3,977.28
  4. Step 4: Simplify right side
    7,289.28x = 40,008,095.88
  5. Step 5: Solve for x
    x = 40,008,095.88/7,289.28
  6. Step 6: Final answer
    x = 5,488.62

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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.