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Finding the Fourth Proportional to 12,162.16, 18,276.16 and 6,619.60

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Solution

The fourth proportional to 12,162.16, 18,276.16 and 6,619.60 is: 9,947.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,162.16 : 18,276.16 = 6,619.60 : x
  2. Step 2: Convert to fraction form
    12,162.16/18,276.16 = 6,619.60/x
  3. Step 3: Cross multiply
    12,162.16x = 18,276.16 × 6,619.60
  4. Step 4: Simplify right side
    12,162.16x = 120,980,868.74
  5. Step 5: Solve for x
    x = 120,980,868.74/12,162.16
  6. Step 6: Final answer
    x = 9,947.32

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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.