Home / 12,405.81-17,119.92-6,740.50

Finding the Fourth Proportional to 12,405.81, 17,119.92 and 6,740.50

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Solution

The fourth proportional to 12,405.81, 17,119.92 and 6,740.50 is: 9,301.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,405.81 : 17,119.92 = 6,740.50 : x
  2. Step 2: Convert to fraction form
    12,405.81/17,119.92 = 6,740.50/x
  3. Step 3: Cross multiply
    12,405.81x = 17,119.92 × 6,740.50
  4. Step 4: Simplify right side
    12,405.81x = 115,396,820.76
  5. Step 5: Solve for x
    x = 115,396,820.76/12,405.81
  6. Step 6: Final answer
    x = 9,301.84

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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.