Home / 18,613.20-27,911.70-6,128.40

Finding the Fourth Proportional to 18,613.20, 27,911.70 and 6,128.40

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Solution

The fourth proportional to 18,613.20, 27,911.70 and 6,128.40 is: 9,189.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,613.20 : 27,911.70 = 6,128.40 : x
  2. Step 2: Convert to fraction form
    18,613.20/27,911.70 = 6,128.40/x
  3. Step 3: Cross multiply
    18,613.20x = 27,911.70 × 6,128.40
  4. Step 4: Simplify right side
    18,613.20x = 171,054,062.28
  5. Step 5: Solve for x
    x = 171,054,062.28/18,613.20
  6. Step 6: Final answer
    x = 9,189.93

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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.