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Finding the Fourth Proportional to 7,928.08, 10,939.80 and 4,572

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Solution

The fourth proportional to 7,928.08, 10,939.80 and 4,572 is: 6,308.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,928.08 : 10,939.80 = 4,572 : x
  2. Step 2: Convert to fraction form
    7,928.08/10,939.80 = 4,572/x
  3. Step 3: Cross multiply
    7,928.08x = 10,939.80 × 4,572
  4. Step 4: Simplify right side
    7,928.08x = 50,016,765.60
  5. Step 5: Solve for x
    x = 50,016,765.60/7,928.08
  6. Step 6: Final answer
    x = 6,308.81

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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.