Home / 20,780,987.76-31,174,407.72-6,405,214.32

Finding the Fourth Proportional to 20,780,987.76, 31,174,407.72 and 6,405,214.32

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Solution

The fourth proportional to 20,780,987.76, 31,174,407.72 and 6,405,214.32 is: 9,608,723.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,780,987.76 : 31,174,407.72 = 6,405,214.32 : x
  2. Step 2: Convert to fraction form
    20,780,987.76/31,174,407.72 = 6,405,214.32/x
  3. Step 3: Cross multiply
    20,780,987.76x = 31,174,407.72 × 6,405,214.32
  4. Step 4: Simplify right side
    20,780,987.76x = 199,678,762,745,662.56
  5. Step 5: Solve for x
    x = 199,678,762,745,662.56/20,780,987.76
  6. Step 6: Final answer
    x = 9,608,723.37

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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.