Home / 12,809.79-17,676.84-7,145.13

Finding the Fourth Proportional to 12,809.79, 17,676.84 and 7,145.13

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Solution

The fourth proportional to 12,809.79, 17,676.84 and 7,145.13 is: 9,859.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,809.79 : 17,676.84 = 7,145.13 : x
  2. Step 2: Convert to fraction form
    12,809.79/17,676.84 = 7,145.13/x
  3. Step 3: Cross multiply
    12,809.79x = 17,676.84 × 7,145.13
  4. Step 4: Simplify right side
    12,809.79x = 126,303,319.79
  5. Step 5: Solve for x
    x = 126,303,319.79/12,809.79
  6. Step 6: Final answer
    x = 9,859.91

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Double scale
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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.