Home / 20,325.44-28,039.04-13,612.48

Finding the Fourth Proportional to 20,325.44, 28,039.04 and 13,612.48

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Solution

The fourth proportional to 20,325.44, 28,039.04 and 13,612.48 is: 18,778.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,325.44 : 28,039.04 = 13,612.48 : x
  2. Step 2: Convert to fraction form
    20,325.44/28,039.04 = 13,612.48/x
  3. Step 3: Cross multiply
    20,325.44x = 28,039.04 × 13,612.48
  4. Step 4: Simplify right side
    20,325.44x = 381,680,871.22
  5. Step 5: Solve for x
    x = 381,680,871.22/20,325.44
  6. Step 6: Final answer
    x = 18,778.48

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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.