Home / 20,775.40-31,144.56-9,079.36

Finding the Fourth Proportional to 20,775.40, 31,144.56 and 9,079.36

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Solution

The fourth proportional to 20,775.40, 31,144.56 and 9,079.36 is: 13,610.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,775.40 : 31,144.56 = 9,079.36 : x
  2. Step 2: Convert to fraction form
    20,775.40/31,144.56 = 9,079.36/x
  3. Step 3: Cross multiply
    20,775.40x = 31,144.56 × 9,079.36
  4. Step 4: Simplify right side
    20,775.40x = 282,772,672.28
  5. Step 5: Solve for x
    x = 282,772,672.28/20,775.40
  6. Step 6: Final answer
    x = 13,610.94

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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.