Home / 20,772.40-31,140.04-9,076.36

Finding the Fourth Proportional to 20,772.40, 31,140.04 and 9,076.36

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Solution

The fourth proportional to 20,772.40, 31,140.04 and 9,076.36 is: 13,606.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,772.40 : 31,140.04 = 9,076.36 : x
  2. Step 2: Convert to fraction form
    20,772.40/31,140.04 = 9,076.36/x
  3. Step 3: Cross multiply
    20,772.40x = 31,140.04 × 9,076.36
  4. Step 4: Simplify right side
    20,772.40x = 282,638,213.45
  5. Step 5: Solve for x
    x = 282,638,213.45/20,772.40
  6. Step 6: Final answer
    x = 13,606.43

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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.