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Finding the Fourth Proportional to 18,590,689.49, 25,655,418.43 and 10,218,834.65

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Solution

The fourth proportional to 18,590,689.49, 25,655,418.43 and 10,218,834.65 is: 14,102,138.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,590,689.49 : 25,655,418.43 = 10,218,834.65 : x
  2. Step 2: Convert to fraction form
    18,590,689.49/25,655,418.43 = 10,218,834.65/x
  3. Step 3: Cross multiply
    18,590,689.49x = 25,655,418.43 × 10,218,834.65
  4. Step 4: Simplify right side
    18,590,689.49x = 262,168,478,851,324.03
  5. Step 5: Solve for x
    x = 262,168,478,851,324.03/18,590,689.49
  6. Step 6: Final answer
    x = 14,102,138.55

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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.