Home / 11,189.76-15,442.68-7,406.40

Finding the Fourth Proportional to 11,189.76, 15,442.68 and 7,406.40

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Solution

The fourth proportional to 11,189.76, 15,442.68 and 7,406.40 is: 10,221.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,189.76 : 15,442.68 = 7,406.40 : x
  2. Step 2: Convert to fraction form
    11,189.76/15,442.68 = 7,406.40/x
  3. Step 3: Cross multiply
    11,189.76x = 15,442.68 × 7,406.40
  4. Step 4: Simplify right side
    11,189.76x = 114,374,665.15
  5. Step 5: Solve for x
    x = 114,374,665.15/11,189.76
  6. Step 6: Final answer
    x = 10,221.37

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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.