Home / 19,785.42-29,680.11-7,308.72

Finding the Fourth Proportional to 19,785.42, 29,680.11 and 7,308.72

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Solution

The fourth proportional to 19,785.42, 29,680.11 and 7,308.72 is: 10,963.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,785.42 : 29,680.11 = 7,308.72 : x
  2. Step 2: Convert to fraction form
    19,785.42/29,680.11 = 7,308.72/x
  3. Step 3: Cross multiply
    19,785.42x = 29,680.11 × 7,308.72
  4. Step 4: Simplify right side
    19,785.42x = 216,923,613.56
  5. Step 5: Solve for x
    x = 216,923,613.56/19,785.42
  6. Step 6: Final answer
    x = 10,963.81

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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.