Home / 3,998,689.12-5,518,174.24-2,163,142.86

Finding the Fourth Proportional to 3,998,689.12, 5,518,174.24 and 2,163,142.86

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Solution

The fourth proportional to 3,998,689.12, 5,518,174.24 and 2,163,142.86 is: 2,985,128.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,998,689.12 : 5,518,174.24 = 2,163,142.86 : x
  2. Step 2: Convert to fraction form
    3,998,689.12/5,518,174.24 = 2,163,142.86/x
  3. Step 3: Cross multiply
    3,998,689.12x = 5,518,174.24 × 2,163,142.86
  4. Step 4: Simplify right side
    3,998,689.12x = 11,936,599,207,491.93
  5. Step 5: Solve for x
    x = 11,936,599,207,491.93/3,998,689.12
  6. Step 6: Final answer
    x = 2,985,128.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.