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Finding the Fourth Proportional to 11,640.28, 17,460.18 and 4,619.20

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Solution

The fourth proportional to 11,640.28, 17,460.18 and 4,619.20 is: 6,928.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,640.28 : 17,460.18 = 4,619.20 : x
  2. Step 2: Convert to fraction form
    11,640.28/17,460.18 = 4,619.20/x
  3. Step 3: Cross multiply
    11,640.28x = 17,460.18 × 4,619.20
  4. Step 4: Simplify right side
    11,640.28x = 80,652,063.46
  5. Step 5: Solve for x
    x = 80,652,063.46/11,640.28
  6. Step 6: Final answer
    x = 6,928.70

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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.