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Finding the Fourth Proportional to 10,928.60, 16,368.60 and 8,984.60

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Solution

The fourth proportional to 10,928.60, 16,368.60 and 8,984.60 is: 13,456.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,928.60 : 16,368.60 = 8,984.60 : x
  2. Step 2: Convert to fraction form
    10,928.60/16,368.60 = 8,984.60/x
  3. Step 3: Cross multiply
    10,928.60x = 16,368.60 × 8,984.60
  4. Step 4: Simplify right side
    10,928.60x = 147,065,323.56
  5. Step 5: Solve for x
    x = 147,065,323.56/10,928.60
  6. Step 6: Final answer
    x = 13,456.92

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.