Home / 20,670.36-30,975.05-12,228.14

Finding the Fourth Proportional to 20,670.36, 30,975.05 and 12,228.14

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Solution

The fourth proportional to 20,670.36, 30,975.05 and 12,228.14 is: 18,324.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,670.36 : 30,975.05 = 12,228.14 : x
  2. Step 2: Convert to fraction form
    20,670.36/30,975.05 = 12,228.14/x
  3. Step 3: Cross multiply
    20,670.36x = 30,975.05 × 12,228.14
  4. Step 4: Simplify right side
    20,670.36x = 378,767,031.89
  5. Step 5: Solve for x
    x = 378,767,031.89/20,670.36
  6. Step 6: Final answer
    x = 18,324.16

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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.