Home / 20,513.20-30,769.80-15,005.20

Finding the Fourth Proportional to 20,513.20, 30,769.80 and 15,005.20

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Solution

The fourth proportional to 20,513.20, 30,769.80 and 15,005.20 is: 22,507.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,513.20 : 30,769.80 = 15,005.20 : x
  2. Step 2: Convert to fraction form
    20,513.20/30,769.80 = 15,005.20/x
  3. Step 3: Cross multiply
    20,513.20x = 30,769.80 × 15,005.20
  4. Step 4: Simplify right side
    20,513.20x = 461,707,002.96
  5. Step 5: Solve for x
    x = 461,707,002.96/20,513.20
  6. Step 6: Final answer
    x = 22,507.80

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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.