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Finding the Fourth Proportional to 12,208.96, 18,320.96 and 4,812.16

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Solution

The fourth proportional to 12,208.96, 18,320.96 and 4,812.16 is: 7,221.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,208.96 : 18,320.96 = 4,812.16 : x
  2. Step 2: Convert to fraction form
    12,208.96/18,320.96 = 4,812.16/x
  3. Step 3: Cross multiply
    12,208.96x = 18,320.96 × 4,812.16
  4. Step 4: Simplify right side
    12,208.96x = 88,163,390.87
  5. Step 5: Solve for x
    x = 88,163,390.87/12,208.96
  6. Step 6: Final answer
    x = 7,221.20

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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.