Home / 18,984.40-28,476.60-9,121.36

Finding the Fourth Proportional to 18,984.40, 28,476.60 and 9,121.36

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Solution

The fourth proportional to 18,984.40, 28,476.60 and 9,121.36 is: 13,682.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,984.40 : 28,476.60 = 9,121.36 : x
  2. Step 2: Convert to fraction form
    18,984.40/28,476.60 = 9,121.36/x
  3. Step 3: Cross multiply
    18,984.40x = 28,476.60 × 9,121.36
  4. Step 4: Simplify right side
    18,984.40x = 259,745,320.18
  5. Step 5: Solve for x
    x = 259,745,320.18/18,984.40
  6. Step 6: Final answer
    x = 13,682.04

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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.