Home / 11,390.80-15,719.40-6,355.60

Finding the Fourth Proportional to 11,390.80, 15,719.40 and 6,355.60

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Solution

The fourth proportional to 11,390.80, 15,719.40 and 6,355.60 is: 8,770.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,390.80 : 15,719.40 = 6,355.60 : x
  2. Step 2: Convert to fraction form
    11,390.80/15,719.40 = 6,355.60/x
  3. Step 3: Cross multiply
    11,390.80x = 15,719.40 × 6,355.60
  4. Step 4: Simplify right side
    11,390.80x = 99,906,218.64
  5. Step 5: Solve for x
    x = 99,906,218.64/11,390.80
  6. Step 6: Final answer
    x = 8,770.78

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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.