Home / 10,286.80-15,430.20-6,128.80

Finding the Fourth Proportional to 10,286.80, 15,430.20 and 6,128.80

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Solution

The fourth proportional to 10,286.80, 15,430.20 and 6,128.80 is: 9,193.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,286.80 : 15,430.20 = 6,128.80 : x
  2. Step 2: Convert to fraction form
    10,286.80/15,430.20 = 6,128.80/x
  3. Step 3: Cross multiply
    10,286.80x = 15,430.20 × 6,128.80
  4. Step 4: Simplify right side
    10,286.80x = 94,568,609.76
  5. Step 5: Solve for x
    x = 94,568,609.76/10,286.80
  6. Step 6: Final answer
    x = 9,193.20

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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.