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Finding the Fourth Proportional to 6,897,668.58, 9,518,785.25 and 3,998,739.92

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Solution

The fourth proportional to 6,897,668.58, 9,518,785.25 and 3,998,739.92 is: 5,518,262.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,897,668.58 : 9,518,785.25 = 3,998,739.92 : x
  2. Step 2: Convert to fraction form
    6,897,668.58/9,518,785.25 = 3,998,739.92/x
  3. Step 3: Cross multiply
    6,897,668.58x = 9,518,785.25 × 3,998,739.92
  4. Step 4: Simplify right side
    6,897,668.58x = 38,063,146,501,494.55
  5. Step 5: Solve for x
    x = 38,063,146,501,494.55/6,897,668.58
  6. Step 6: Final answer
    x = 5,518,262.59

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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.