Home / 9,139.26-12,613.02-5,161.35

Finding the Fourth Proportional to 9,139.26, 12,613.02 and 5,161.35

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Solution

The fourth proportional to 9,139.26, 12,613.02 and 5,161.35 is: 7,123.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,139.26 : 12,613.02 = 5,161.35 : x
  2. Step 2: Convert to fraction form
    9,139.26/12,613.02 = 5,161.35/x
  3. Step 3: Cross multiply
    9,139.26x = 12,613.02 × 5,161.35
  4. Step 4: Simplify right side
    9,139.26x = 65,100,210.78
  5. Step 5: Solve for x
    x = 65,100,210.78/9,139.26
  6. Step 6: Final answer
    x = 7,123.14

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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.