Home / 21,105,581.47-29,143,879.58-13,278,140.60

Finding the Fourth Proportional to 21,105,581.47, 29,143,879.58 and 13,278,140.60

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Solution

The fourth proportional to 21,105,581.47, 29,143,879.58 and 13,278,140.60 is: 18,335,269.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,105,581.47 : 29,143,879.58 = 13,278,140.60 : x
  2. Step 2: Convert to fraction form
    21,105,581.47/29,143,879.58 = 13,278,140.60/x
  3. Step 3: Cross multiply
    21,105,581.47x = 29,143,879.58 × 13,278,140.60
  4. Step 4: Simplify right side
    21,105,581.47x = 386,976,530,580,184.94
  5. Step 5: Solve for x
    x = 386,976,530,580,184.94/21,105,581.47
  6. Step 6: Final answer
    x = 18,335,269.80

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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.