Home / 18,984.50-28,420.68-14,021.18

Finding the Fourth Proportional to 18,984.50, 28,420.68 and 14,021.18

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Solution

The fourth proportional to 18,984.50, 28,420.68 and 14,021.18 is: 20,990.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,984.50 : 28,420.68 = 14,021.18 : x
  2. Step 2: Convert to fraction form
    18,984.50/28,420.68 = 14,021.18/x
  3. Step 3: Cross multiply
    18,984.50x = 28,420.68 × 14,021.18
  4. Step 4: Simplify right side
    18,984.50x = 398,491,470.00
  5. Step 5: Solve for x
    x = 398,491,470.00/18,984.50
  6. Step 6: Final answer
    x = 20,990.36

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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.