Home / 20,297.79-30,434.33-11,979.70

Finding the Fourth Proportional to 20,297.79, 30,434.33 and 11,979.70

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Solution

The fourth proportional to 20,297.79, 30,434.33 and 11,979.70 is: 17,962.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,297.79 : 30,434.33 = 11,979.70 : x
  2. Step 2: Convert to fraction form
    20,297.79/30,434.33 = 11,979.70/x
  3. Step 3: Cross multiply
    20,297.79x = 30,434.33 × 11,979.70
  4. Step 4: Simplify right side
    20,297.79x = 364,594,096.96
  5. Step 5: Solve for x
    x = 364,594,096.96/20,297.79
  6. Step 6: Final answer
    x = 17,962.26

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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.