Home / 12,378.32-17,083.25-7,072.11

Finding the Fourth Proportional to 12,378.32, 17,083.25 and 7,072.11

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Solution

The fourth proportional to 12,378.32, 17,083.25 and 7,072.11 is: 9,760.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,378.32 : 17,083.25 = 7,072.11 : x
  2. Step 2: Convert to fraction form
    12,378.32/17,083.25 = 7,072.11/x
  3. Step 3: Cross multiply
    12,378.32x = 17,083.25 × 7,072.11
  4. Step 4: Simplify right side
    12,378.32x = 120,814,654.10
  5. Step 5: Solve for x
    x = 120,814,654.10/12,378.32
  6. Step 6: Final answer
    x = 9,760.18

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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.