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Finding the Fourth Proportional to 20,702,985.15, 31,054,477.73 and 20,702,985.15

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Solution

The fourth proportional to 20,702,985.15, 31,054,477.73 and 20,702,985.15 is: 31,054,477.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,702,985.15 : 31,054,477.73 = 20,702,985.15 : x
  2. Step 2: Convert to fraction form
    20,702,985.15/31,054,477.73 = 20,702,985.15/x
  3. Step 3: Cross multiply
    20,702,985.15x = 31,054,477.73 × 20,702,985.15
  4. Step 4: Simplify right side
    20,702,985.15x = 642,920,391,285,195.62
  5. Step 5: Solve for x
    x = 642,920,391,285,195.62/20,702,985.15
  6. Step 6: Final answer
    x = 31,054,477.73

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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.