Home / 11,081.60-16,638.60-7,809.20

Finding the Fourth Proportional to 11,081.60, 16,638.60 and 7,809.20

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Solution

The fourth proportional to 11,081.60, 16,638.60 and 7,809.20 is: 11,725.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,081.60 : 16,638.60 = 7,809.20 : x
  2. Step 2: Convert to fraction form
    11,081.60/16,638.60 = 7,809.20/x
  3. Step 3: Cross multiply
    11,081.60x = 16,638.60 × 7,809.20
  4. Step 4: Simplify right side
    11,081.60x = 129,934,155.12
  5. Step 5: Solve for x
    x = 129,934,155.12/11,081.60
  6. Step 6: Final answer
    x = 11,725.22

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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.