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Finding the Fourth Proportional to 6,897,679.83, 9,518,800.77 and 3,998,751.21

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Solution

The fourth proportional to 6,897,679.83, 9,518,800.77 and 3,998,751.21 is: 5,518,278.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,897,679.83 : 9,518,800.77 = 3,998,751.21 : x
  2. Step 2: Convert to fraction form
    6,897,679.83/9,518,800.77 = 3,998,751.21/x
  3. Step 3: Cross multiply
    6,897,679.83x = 9,518,800.77 × 3,998,751.21
  4. Step 4: Simplify right side
    6,897,679.83x = 38,063,316,096,786.43
  5. Step 5: Solve for x
    x = 38,063,316,096,786.43/6,897,679.83
  6. Step 6: Final answer
    x = 5,518,278.18

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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.