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Finding the Fourth Proportional to 15,028.50, 20,739.22 and 8,981.49

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Solution

The fourth proportional to 15,028.50, 20,739.22 and 8,981.49 is: 12,394.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,028.50 : 20,739.22 = 8,981.49 : x
  2. Step 2: Convert to fraction form
    15,028.50/20,739.22 = 8,981.49/x
  3. Step 3: Cross multiply
    15,028.50x = 20,739.22 × 8,981.49
  4. Step 4: Simplify right side
    15,028.50x = 186,269,097.04
  5. Step 5: Solve for x
    x = 186,269,097.04/15,028.50
  6. Step 6: Final answer
    x = 12,394.39

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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.