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Finding the Fourth Proportional to 20,691,477.70, 31,037,216.55 and 20,691,477.70

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Solution

The fourth proportional to 20,691,477.70, 31,037,216.55 and 20,691,477.70 is: 31,037,216.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,691,477.70 : 31,037,216.55 = 20,691,477.70 : x
  2. Step 2: Convert to fraction form
    20,691,477.70/31,037,216.55 = 20,691,477.70/x
  3. Step 3: Cross multiply
    20,691,477.70x = 31,037,216.55 × 20,691,477.70
  4. Step 4: Simplify right side
    20,691,477.70x = 642,205,874,114,395.88
  5. Step 5: Solve for x
    x = 642,205,874,114,395.88/20,691,477.70
  6. Step 6: Final answer
    x = 31,037,216.55

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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.