Home / 12,378.40-18,569.66-6,138.62

Finding the Fourth Proportional to 12,378.40, 18,569.66 and 6,138.62

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Solution

The fourth proportional to 12,378.40, 18,569.66 and 6,138.62 is: 9,208.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,378.40 : 18,569.66 = 6,138.62 : x
  2. Step 2: Convert to fraction form
    12,378.40/18,569.66 = 6,138.62/x
  3. Step 3: Cross multiply
    12,378.40x = 18,569.66 × 6,138.62
  4. Step 4: Simplify right side
    12,378.40x = 113,992,032.36
  5. Step 5: Solve for x
    x = 113,992,032.36/12,378.40
  6. Step 6: Final answer
    x = 9,208.94

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.