Home / 11,419.81-17,121.40-7,712.84

Finding the Fourth Proportional to 11,419.81, 17,121.40 and 7,712.84

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Solution

The fourth proportional to 11,419.81, 17,121.40 and 7,712.84 is: 11,563.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,419.81 : 17,121.40 = 7,712.84 : x
  2. Step 2: Convert to fraction form
    11,419.81/17,121.40 = 7,712.84/x
  3. Step 3: Cross multiply
    11,419.81x = 17,121.40 × 7,712.84
  4. Step 4: Simplify right side
    11,419.81x = 132,054,618.78
  5. Step 5: Solve for x
    x = 132,054,618.78/11,419.81
  6. Step 6: Final answer
    x = 11,563.64

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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.