Home / 12,811.18-17,678.56-7,433.78

Finding the Fourth Proportional to 12,811.18, 17,678.56 and 7,433.78

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Solution

The fourth proportional to 12,811.18, 17,678.56 and 7,433.78 is: 10,258.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,811.18 : 17,678.56 = 7,433.78 : x
  2. Step 2: Convert to fraction form
    12,811.18/17,678.56 = 7,433.78/x
  3. Step 3: Cross multiply
    12,811.18x = 17,678.56 × 7,433.78
  4. Step 4: Simplify right side
    12,811.18x = 131,418,453.63
  5. Step 5: Solve for x
    x = 131,418,453.63/12,811.18
  6. Step 6: Final answer
    x = 10,258.11

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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.