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Finding the Fourth Proportional to 10,779.92, 16,169.88 and 4,209.20

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Solution

The fourth proportional to 10,779.92, 16,169.88 and 4,209.20 is: 6,313.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,779.92 : 16,169.88 = 4,209.20 : x
  2. Step 2: Convert to fraction form
    10,779.92/16,169.88 = 4,209.20/x
  3. Step 3: Cross multiply
    10,779.92x = 16,169.88 × 4,209.20
  4. Step 4: Simplify right side
    10,779.92x = 68,062,258.90
  5. Step 5: Solve for x
    x = 68,062,258.90/10,779.92
  6. Step 6: Final answer
    x = 6,313.80

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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.