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Finding the Fourth Proportional to 11,640.80, 17,461.20 and 5,808.80

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Solution

The fourth proportional to 11,640.80, 17,461.20 and 5,808.80 is: 8,713.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,640.80 : 17,461.20 = 5,808.80 : x
  2. Step 2: Convert to fraction form
    11,640.80/17,461.20 = 5,808.80/x
  3. Step 3: Cross multiply
    11,640.80x = 17,461.20 × 5,808.80
  4. Step 4: Simplify right side
    11,640.80x = 101,428,618.56
  5. Step 5: Solve for x
    x = 101,428,618.56/11,640.80
  6. Step 6: Final answer
    x = 8,713.20

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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.