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Finding the Fourth Proportional to 26,859,620.80, 40,203,700.80 and 21,190,916.80

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Solution

The fourth proportional to 26,859,620.80, 40,203,700.80 and 21,190,916.80 is: 31,718,738.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,859,620.80 : 40,203,700.80 = 21,190,916.80 : x
  2. Step 2: Convert to fraction form
    26,859,620.80/40,203,700.80 = 21,190,916.80/x
  3. Step 3: Cross multiply
    26,859,620.80x = 40,203,700.80 × 21,190,916.80
  4. Step 4: Simplify right side
    26,859,620.80x = 851,953,278,704,893.38
  5. Step 5: Solve for x
    x = 851,953,278,704,893.38/26,859,620.80
  6. Step 6: Final answer
    x = 31,718,738.14

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.