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Finding the Fourth Proportional to 20,808,003.30, 31,212,004.95 and 20,808,003.30

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Solution

The fourth proportional to 20,808,003.30, 31,212,004.95 and 20,808,003.30 is: 31,212,004.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,808,003.30 : 31,212,004.95 = 20,808,003.30 : x
  2. Step 2: Convert to fraction form
    20,808,003.30/31,212,004.95 = 20,808,003.30/x
  3. Step 3: Cross multiply
    20,808,003.30x = 31,212,004.95 × 20,808,003.30
  4. Step 4: Simplify right side
    20,808,003.30x = 649,459,501,999,216.38
  5. Step 5: Solve for x
    x = 649,459,501,999,216.38/20,808,003.30
  6. Step 6: Final answer
    x = 31,212,004.95

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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.