Home / 20,720.67-31,076.64-6,681.98

Finding the Fourth Proportional to 20,720.67, 31,076.64 and 6,681.98

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Solution

The fourth proportional to 20,720.67, 31,076.64 and 6,681.98 is: 10,021.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,720.67 : 31,076.64 = 6,681.98 : x
  2. Step 2: Convert to fraction form
    20,720.67/31,076.64 = 6,681.98/x
  3. Step 3: Cross multiply
    20,720.67x = 31,076.64 × 6,681.98
  4. Step 4: Simplify right side
    20,720.67x = 207,653,331.56
  5. Step 5: Solve for x
    x = 207,653,331.56/20,720.67
  6. Step 6: Final answer
    x = 10,021.55

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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.