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Finding the Fourth Proportional to 18,028.80, 27,032.40 and 9,280.80

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Solution

The fourth proportional to 18,028.80, 27,032.40 and 9,280.80 is: 13,915.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,028.80 : 27,032.40 = 9,280.80 : x
  2. Step 2: Convert to fraction form
    18,028.80/27,032.40 = 9,280.80/x
  3. Step 3: Cross multiply
    18,028.80x = 27,032.40 × 9,280.80
  4. Step 4: Simplify right side
    18,028.80x = 250,882,297.92
  5. Step 5: Solve for x
    x = 250,882,297.92/18,028.80
  6. Step 6: Final answer
    x = 13,915.64

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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.