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Finding the Fourth Proportional to 12,405.70, 17,120.02 and 6,740.46

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Solution

The fourth proportional to 12,405.70, 17,120.02 and 6,740.46 is: 9,301.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,405.70 : 17,120.02 = 6,740.46 : x
  2. Step 2: Convert to fraction form
    12,405.70/17,120.02 = 6,740.46/x
  3. Step 3: Cross multiply
    12,405.70x = 17,120.02 × 6,740.46
  4. Step 4: Simplify right side
    12,405.70x = 115,396,810.01
  5. Step 5: Solve for x
    x = 115,396,810.01/12,405.70
  6. Step 6: Final answer
    x = 9,301.92

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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.