Home / 9,140.42-12,613.78-5,161.79

Finding the Fourth Proportional to 9,140.42, 12,613.78 and 5,161.79

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Solution

The fourth proportional to 9,140.42, 12,613.78 and 5,161.79 is: 7,123.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,140.42 : 12,613.78 = 5,161.79 : x
  2. Step 2: Convert to fraction form
    9,140.42/12,613.78 = 5,161.79/x
  3. Step 3: Cross multiply
    9,140.42x = 12,613.78 × 5,161.79
  4. Step 4: Simplify right side
    9,140.42x = 65,109,620.40
  5. Step 5: Solve for x
    x = 65,109,620.40/9,140.42
  6. Step 6: Final answer
    x = 7,123.27

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.