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Finding the Fourth Proportional to 15,928.84, 23,893.87 and 8,128.54

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Solution

The fourth proportional to 15,928.84, 23,893.87 and 8,128.54 is: 12,193.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,928.84 : 23,893.87 = 8,128.54 : x
  2. Step 2: Convert to fraction form
    15,928.84/23,893.87 = 8,128.54/x
  3. Step 3: Cross multiply
    15,928.84x = 23,893.87 × 8,128.54
  4. Step 4: Simplify right side
    15,928.84x = 194,222,358.11
  5. Step 5: Solve for x
    x = 194,222,358.11/15,928.84
  6. Step 6: Final answer
    x = 12,193.12

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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.