Home / 20,285.60-30,421.02-7,799.20

Finding the Fourth Proportional to 20,285.60, 30,421.02 and 7,799.20

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Solution

The fourth proportional to 20,285.60, 30,421.02 and 7,799.20 is: 11,695.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,285.60 : 30,421.02 = 7,799.20 : x
  2. Step 2: Convert to fraction form
    20,285.60/30,421.02 = 7,799.20/x
  3. Step 3: Cross multiply
    20,285.60x = 30,421.02 × 7,799.20
  4. Step 4: Simplify right side
    20,285.60x = 237,259,619.18
  5. Step 5: Solve for x
    x = 237,259,619.18/20,285.60
  6. Step 6: Final answer
    x = 11,695.96

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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.