Home / 20,280.96-30,425.60-7,800.96

Finding the Fourth Proportional to 20,280.96, 30,425.60 and 7,800.96

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Solution

The fourth proportional to 20,280.96, 30,425.60 and 7,800.96 is: 11,703.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,280.96 : 30,425.60 = 7,800.96 : x
  2. Step 2: Convert to fraction form
    20,280.96/30,425.60 = 7,800.96/x
  3. Step 3: Cross multiply
    20,280.96x = 30,425.60 × 7,800.96
  4. Step 4: Simplify right side
    20,280.96x = 237,348,888.58
  5. Step 5: Solve for x
    x = 237,348,888.58/20,280.96
  6. Step 6: Final answer
    x = 11,703.04

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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.