Home / 11,990.16-17,987.40-5,419.44

Finding the Fourth Proportional to 11,990.16, 17,987.40 and 5,419.44

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Solution

The fourth proportional to 11,990.16, 17,987.40 and 5,419.44 is: 8,130.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,990.16 : 17,987.40 = 5,419.44 : x
  2. Step 2: Convert to fraction form
    11,990.16/17,987.40 = 5,419.44/x
  3. Step 3: Cross multiply
    11,990.16x = 17,987.40 × 5,419.44
  4. Step 4: Simplify right side
    11,990.16x = 97,481,635.06
  5. Step 5: Solve for x
    x = 97,481,635.06/11,990.16
  6. Step 6: Final answer
    x = 8,130.14

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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.