Home / 18,209,489,431.12-25,115,181,982.42-15,673,418,730.68

Finding the Fourth Proportional to 18,209,489,431.12, 25,115,181,982.42 and 15,673,418,730.68

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Solution

The fourth proportional to 18,209,489,431.12, 25,115,181,982.42 and 15,673,418,730.68 is: 21,617,342,166.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,209,489,431.12 : 25,115,181,982.42 = 15,673,418,730.68 : x
  2. Step 2: Convert to fraction form
    18,209,489,431.12/25,115,181,982.42 = 15,673,418,730.68/x
  3. Step 3: Cross multiply
    18,209,489,431.12x = 25,115,181,982.42 × 15,673,418,730.68
  4. Step 4: Simplify right side
    18,209,489,431.12x = 393,640,763,707,698,446,336
  5. Step 5: Solve for x
    x = 393,640,763,707,698,446,336/18,209,489,431.12
  6. Step 6: Final answer
    x = 21,617,342,166.39

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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.