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Finding the Fourth Proportional to 13,479.74, 20,223.24 and 7,640.45

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Solution

The fourth proportional to 13,479.74, 20,223.24 and 7,640.45 is: 11,462.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,479.74 : 20,223.24 = 7,640.45 : x
  2. Step 2: Convert to fraction form
    13,479.74/20,223.24 = 7,640.45/x
  3. Step 3: Cross multiply
    13,479.74x = 20,223.24 × 7,640.45
  4. Step 4: Simplify right side
    13,479.74x = 154,514,552.94
  5. Step 5: Solve for x
    x = 154,514,552.94/13,479.74
  6. Step 6: Final answer
    x = 11,462.73

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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.