Home / 11,109.60-15,333.12-6,636.78

Finding the Fourth Proportional to 11,109.60, 15,333.12 and 6,636.78

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Solution

The fourth proportional to 11,109.60, 15,333.12 and 6,636.78 is: 9,159.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,109.60 : 15,333.12 = 6,636.78 : x
  2. Step 2: Convert to fraction form
    11,109.60/15,333.12 = 6,636.78/x
  3. Step 3: Cross multiply
    11,109.60x = 15,333.12 × 6,636.78
  4. Step 4: Simplify right side
    11,109.60x = 101,762,544.15
  5. Step 5: Solve for x
    x = 101,762,544.15/11,109.60
  6. Step 6: Final answer
    x = 9,159.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.