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Finding the Fourth Proportional to 11,078.40, 16,617.60 and 9,620.40

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Solution

The fourth proportional to 11,078.40, 16,617.60 and 9,620.40 is: 14,430.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,078.40 : 16,617.60 = 9,620.40 : x
  2. Step 2: Convert to fraction form
    11,078.40/16,617.60 = 9,620.40/x
  3. Step 3: Cross multiply
    11,078.40x = 16,617.60 × 9,620.40
  4. Step 4: Simplify right side
    11,078.40x = 159,867,959.04
  5. Step 5: Solve for x
    x = 159,867,959.04/11,078.40
  6. Step 6: Final answer
    x = 14,430.60

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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.