Home / 9,378.29-12,920.09-6,540.51

Finding the Fourth Proportional to 9,378.29, 12,920.09 and 6,540.51

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Solution

The fourth proportional to 9,378.29, 12,920.09 and 6,540.51 is: 9,010.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,378.29 : 12,920.09 = 6,540.51 : x
  2. Step 2: Convert to fraction form
    9,378.29/12,920.09 = 6,540.51/x
  3. Step 3: Cross multiply
    9,378.29x = 12,920.09 × 6,540.51
  4. Step 4: Simplify right side
    9,378.29x = 84,503,993.59
  5. Step 5: Solve for x
    x = 84,503,993.59/9,378.29
  6. Step 6: Final answer
    x = 9,010.59

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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.