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Finding the Fourth Proportional to 14,078.92, 21,137.82 and 7,158.28

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Solution

The fourth proportional to 14,078.92, 21,137.82 and 7,158.28 is: 10,747.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,078.92 : 21,137.82 = 7,158.28 : x
  2. Step 2: Convert to fraction form
    14,078.92/21,137.82 = 7,158.28/x
  3. Step 3: Cross multiply
    14,078.92x = 21,137.82 × 7,158.28
  4. Step 4: Simplify right side
    14,078.92x = 151,310,434.15
  5. Step 5: Solve for x
    x = 151,310,434.15/14,078.92
  6. Step 6: Final answer
    x = 10,747.30

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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.