Home / 21,078,227.88-29,076,734.03-12,820,815.72

Finding the Fourth Proportional to 21,078,227.88, 29,076,734.03 and 12,820,815.72

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Solution

The fourth proportional to 21,078,227.88, 29,076,734.03 and 12,820,815.72 is: 17,685,900.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,078,227.88 : 29,076,734.03 = 12,820,815.72 : x
  2. Step 2: Convert to fraction form
    21,078,227.88/29,076,734.03 = 12,820,815.72/x
  3. Step 3: Cross multiply
    21,078,227.88x = 29,076,734.03 × 12,820,815.72
  4. Step 4: Simplify right side
    21,078,227.88x = 372,787,448,673,978.88
  5. Step 5: Solve for x
    x = 372,787,448,673,978.88/21,078,227.88
  6. Step 6: Final answer
    x = 17,685,900.86

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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.