Home / 20,821,122.88-31,089,958.48-18,371,864.64

Finding the Fourth Proportional to 20,821,122.88, 31,089,958.48 and 18,371,864.64

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Solution

The fourth proportional to 20,821,122.88, 31,089,958.48 and 18,371,864.64 is: 27,432,742.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,821,122.88 : 31,089,958.48 = 18,371,864.64 : x
  2. Step 2: Convert to fraction form
    20,821,122.88/31,089,958.48 = 18,371,864.64/x
  3. Step 3: Cross multiply
    20,821,122.88x = 31,089,958.48 × 18,371,864.64
  4. Step 4: Simplify right side
    20,821,122.88x = 571,180,508,857,780.12
  5. Step 5: Solve for x
    x = 571,180,508,857,780.12/20,821,122.88
  6. Step 6: Final answer
    x = 27,432,742.80

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.