Home / 20,079.42-30,120.81-6,931.90

Finding the Fourth Proportional to 20,079.42, 30,120.81 and 6,931.90

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Solution

The fourth proportional to 20,079.42, 30,120.81 and 6,931.90 is: 10,398.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,079.42 : 30,120.81 = 6,931.90 : x
  2. Step 2: Convert to fraction form
    20,079.42/30,120.81 = 6,931.90/x
  3. Step 3: Cross multiply
    20,079.42x = 30,120.81 × 6,931.90
  4. Step 4: Simplify right side
    20,079.42x = 208,794,442.84
  5. Step 5: Solve for x
    x = 208,794,442.84/20,079.42
  6. Step 6: Final answer
    x = 10,398.43

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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.