Home / 21,245,505.96-31,900,145.40-12,157,864.86

Finding the Fourth Proportional to 21,245,505.96, 31,900,145.40 and 12,157,864.86

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Solution

The fourth proportional to 21,245,505.96, 31,900,145.40 and 12,157,864.86 is: 18,255,044.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,245,505.96 : 31,900,145.40 = 12,157,864.86 : x
  2. Step 2: Convert to fraction form
    21,245,505.96/31,900,145.40 = 12,157,864.86/x
  3. Step 3: Cross multiply
    21,245,505.96x = 31,900,145.40 × 12,157,864.86
  4. Step 4: Simplify right side
    21,245,505.96x = 387,837,656,787,550.62
  5. Step 5: Solve for x
    x = 387,837,656,787,550.62/21,245,505.96
  6. Step 6: Final answer
    x = 18,255,044.50

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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.