Home / 20,821,438.44-28,729,501.74-13,081,996.80

Finding the Fourth Proportional to 20,821,438.44, 28,729,501.74 and 13,081,996.80

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Solution

The fourth proportional to 20,821,438.44, 28,729,501.74 and 13,081,996.80 is: 18,050,590.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,821,438.44 : 28,729,501.74 = 13,081,996.80 : x
  2. Step 2: Convert to fraction form
    20,821,438.44/28,729,501.74 = 13,081,996.80/x
  3. Step 3: Cross multiply
    20,821,438.44x = 28,729,501.74 × 13,081,996.80
  4. Step 4: Simplify right side
    20,821,438.44x = 375,839,249,828,274.44
  5. Step 5: Solve for x
    x = 375,839,249,828,274.44/20,821,438.44
  6. Step 6: Final answer
    x = 18,050,590.06

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.