Home / 11,201.58-15,456.37-6,420.64

Finding the Fourth Proportional to 11,201.58, 15,456.37 and 6,420.64

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Solution

The fourth proportional to 11,201.58, 15,456.37 and 6,420.64 is: 8,859.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,201.58 : 15,456.37 = 6,420.64 : x
  2. Step 2: Convert to fraction form
    11,201.58/15,456.37 = 6,420.64/x
  3. Step 3: Cross multiply
    11,201.58x = 15,456.37 × 6,420.64
  4. Step 4: Simplify right side
    11,201.58x = 99,239,806.46
  5. Step 5: Solve for x
    x = 99,239,806.46/11,201.58
  6. Step 6: Final answer
    x = 8,859.45

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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.