Home / 12,405.57-17,119.86-6,740.40

Finding the Fourth Proportional to 12,405.57, 17,119.86 and 6,740.40

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Solution

The fourth proportional to 12,405.57, 17,119.86 and 6,740.40 is: 9,301.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,405.57 : 17,119.86 = 6,740.40 : x
  2. Step 2: Convert to fraction form
    12,405.57/17,119.86 = 6,740.40/x
  3. Step 3: Cross multiply
    12,405.57x = 17,119.86 × 6,740.40
  4. Step 4: Simplify right side
    12,405.57x = 115,394,704.34
  5. Step 5: Solve for x
    x = 115,394,704.34/12,405.57
  6. Step 6: Final answer
    x = 9,301.85

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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.