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Finding the Fourth Proportional to 20,778,874.60, 31,168,311.90 and 20,778,874.60

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Solution

The fourth proportional to 20,778,874.60, 31,168,311.90 and 20,778,874.60 is: 31,168,311.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,778,874.60 : 31,168,311.90 = 20,778,874.60 : x
  2. Step 2: Convert to fraction form
    20,778,874.60/31,168,311.90 = 20,778,874.60/x
  3. Step 3: Cross multiply
    20,778,874.60x = 31,168,311.90 × 20,778,874.60
  4. Step 4: Simplify right side
    20,778,874.60x = 647,642,444,463,787.75
  5. Step 5: Solve for x
    x = 647,642,444,463,787.75/20,778,874.60
  6. Step 6: Final answer
    x = 31,168,311.90

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1.5x scale

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.