Home / 20,780,985.76-31,174,404.72-6,405,212.32

Finding the Fourth Proportional to 20,780,985.76, 31,174,404.72 and 6,405,212.32

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Solution

The fourth proportional to 20,780,985.76, 31,174,404.72 and 6,405,212.32 is: 9,608,720.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,780,985.76 : 31,174,404.72 = 6,405,212.32 : x
  2. Step 2: Convert to fraction form
    20,780,985.76/31,174,404.72 = 6,405,212.32/x
  3. Step 3: Cross multiply
    20,780,985.76x = 31,174,404.72 × 6,405,212.32
  4. Step 4: Simplify right side
    20,780,985.76x = 199,678,681,181,210.16
  5. Step 5: Solve for x
    x = 199,678,681,181,210.16/20,780,985.76
  6. Step 6: Final answer
    x = 9,608,720.37

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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.