Home / 20,575.12-30,862.80-7,429.60

Finding the Fourth Proportional to 20,575.12, 30,862.80 and 7,429.60

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Solution

The fourth proportional to 20,575.12, 30,862.80 and 7,429.60 is: 11,144.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,575.12 : 30,862.80 = 7,429.60 : x
  2. Step 2: Convert to fraction form
    20,575.12/30,862.80 = 7,429.60/x
  3. Step 3: Cross multiply
    20,575.12x = 30,862.80 × 7,429.60
  4. Step 4: Simplify right side
    20,575.12x = 229,298,258.88
  5. Step 5: Solve for x
    x = 229,298,258.88/20,575.12
  6. Step 6: Final answer
    x = 11,144.44

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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.