Home / 12,743.80-17,585.85-7,078.91

Finding the Fourth Proportional to 12,743.80, 17,585.85 and 7,078.91

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Solution

The fourth proportional to 12,743.80, 17,585.85 and 7,078.91 is: 9,768.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,743.80 : 17,585.85 = 7,078.91 : x
  2. Step 2: Convert to fraction form
    12,743.80/17,585.85 = 7,078.91/x
  3. Step 3: Cross multiply
    12,743.80x = 17,585.85 × 7,078.91
  4. Step 4: Simplify right side
    12,743.80x = 124,488,649.42
  5. Step 5: Solve for x
    x = 124,488,649.42/12,743.80
  6. Step 6: Final answer
    x = 9,768.57

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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.