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Finding the Fourth Proportional to 11,460.80, 17,191.20 and 8,865.60

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Solution

The fourth proportional to 11,460.80, 17,191.20 and 8,865.60 is: 13,298.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,460.80 : 17,191.20 = 8,865.60 : x
  2. Step 2: Convert to fraction form
    11,460.80/17,191.20 = 8,865.60/x
  3. Step 3: Cross multiply
    11,460.80x = 17,191.20 × 8,865.60
  4. Step 4: Simplify right side
    11,460.80x = 152,410,302.72
  5. Step 5: Solve for x
    x = 152,410,302.72/11,460.80
  6. Step 6: Final answer
    x = 13,298.40

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1.5x scale

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.