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Finding the Fourth Proportional to 21,857,207.10, 30,644,879.70 and 21,857,207.10

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Solution

The fourth proportional to 21,857,207.10, 30,644,879.70 and 21,857,207.10 is: 30,644,879.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,857,207.10 : 30,644,879.70 = 21,857,207.10 : x
  2. Step 2: Convert to fraction form
    21,857,207.10/30,644,879.70 = 21,857,207.10/x
  3. Step 3: Cross multiply
    21,857,207.10x = 30,644,879.70 × 21,857,207.10
  4. Step 4: Simplify right side
    21,857,207.10x = 669,811,482,157,485.88
  5. Step 5: Solve for x
    x = 669,811,482,157,485.88/21,857,207.10
  6. Step 6: Final answer
    x = 30,644,879.70

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.