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Finding the Fourth Proportional to 18,915.54, 28,390.82 and 9,562.16

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Solution

The fourth proportional to 18,915.54, 28,390.82 and 9,562.16 is: 14,352.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,915.54 : 28,390.82 = 9,562.16 : x
  2. Step 2: Convert to fraction form
    18,915.54/28,390.82 = 9,562.16/x
  3. Step 3: Cross multiply
    18,915.54x = 28,390.82 × 9,562.16
  4. Step 4: Simplify right side
    18,915.54x = 271,477,563.37
  5. Step 5: Solve for x
    x = 271,477,563.37/18,915.54
  6. Step 6: Final answer
    x = 14,352.09

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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.