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Finding the Fourth Proportional to 18,272.16, 25,220.16 and 12,222.72

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Solution

The fourth proportional to 18,272.16, 25,220.16 and 12,222.72 is: 16,870.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,272.16 : 25,220.16 = 12,222.72 : x
  2. Step 2: Convert to fraction form
    18,272.16/25,220.16 = 12,222.72/x
  3. Step 3: Cross multiply
    18,272.16x = 25,220.16 × 12,222.72
  4. Step 4: Simplify right side
    18,272.16x = 308,258,954.04
  5. Step 5: Solve for x
    x = 308,258,954.04/18,272.16
  6. Step 6: Final answer
    x = 16,870.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.