Home / 20,772.48-31,141.28-9,076.80

Finding the Fourth Proportional to 20,772.48, 31,141.28 and 9,076.80

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Solution

The fourth proportional to 20,772.48, 31,141.28 and 9,076.80 is: 13,607.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,772.48 : 31,141.28 = 9,076.80 : x
  2. Step 2: Convert to fraction form
    20,772.48/31,141.28 = 9,076.80/x
  3. Step 3: Cross multiply
    20,772.48x = 31,141.28 × 9,076.80
  4. Step 4: Simplify right side
    20,772.48x = 282,663,170.30
  5. Step 5: Solve for x
    x = 282,663,170.30/20,772.48
  6. Step 6: Final answer
    x = 13,607.58

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1.5x scale

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.