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Finding the Fourth Proportional to 20,891,636.42, 31,338,894.44 and 8,748,873.86

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Solution

The fourth proportional to 20,891,636.42, 31,338,894.44 and 8,748,873.86 is: 13,123,913.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,891,636.42 : 31,338,894.44 = 8,748,873.86 : x
  2. Step 2: Convert to fraction form
    20,891,636.42/31,338,894.44 = 8,748,873.86/x
  3. Step 3: Cross multiply
    20,891,636.42x = 31,338,894.44 × 8,748,873.86
  4. Step 4: Simplify right side
    20,891,636.42x = 274,180,034,232,593.06
  5. Step 5: Solve for x
    x = 274,180,034,232,593.06/20,891,636.42
  6. Step 6: Final answer
    x = 13,123,913.74

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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.