Home / 20,673.28-31,001.82-8,978.50

Finding the Fourth Proportional to 20,673.28, 31,001.82 and 8,978.50

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Solution

The fourth proportional to 20,673.28, 31,001.82 and 8,978.50 is: 13,464.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,673.28 : 31,001.82 = 8,978.50 : x
  2. Step 2: Convert to fraction form
    20,673.28/31,001.82 = 8,978.50/x
  3. Step 3: Cross multiply
    20,673.28x = 31,001.82 × 8,978.50
  4. Step 4: Simplify right side
    20,673.28x = 278,349,840.87
  5. Step 5: Solve for x
    x = 278,349,840.87/20,673.28
  6. Step 6: Final answer
    x = 13,464.23

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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.