Home / 20,775.28-31,144.36-7,624.60

Finding the Fourth Proportional to 20,775.28, 31,144.36 and 7,624.60

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Solution

The fourth proportional to 20,775.28, 31,144.36 and 7,624.60 is: 11,430.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,775.28 : 31,144.36 = 7,624.60 : x
  2. Step 2: Convert to fraction form
    20,775.28/31,144.36 = 7,624.60/x
  3. Step 3: Cross multiply
    20,775.28x = 31,144.36 × 7,624.60
  4. Step 4: Simplify right side
    20,775.28x = 237,463,287.26
  5. Step 5: Solve for x
    x = 237,463,287.26/20,775.28
  6. Step 6: Final answer
    x = 11,430.09

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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.