Home / 11,947.14-17,920.50-4,155.78

Finding the Fourth Proportional to 11,947.14, 17,920.50 and 4,155.78

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Solution

The fourth proportional to 11,947.14, 17,920.50 and 4,155.78 is: 6,233.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,947.14 : 17,920.50 = 4,155.78 : x
  2. Step 2: Convert to fraction form
    11,947.14/17,920.50 = 4,155.78/x
  3. Step 3: Cross multiply
    11,947.14x = 17,920.50 × 4,155.78
  4. Step 4: Simplify right side
    11,947.14x = 74,473,655.49
  5. Step 5: Solve for x
    x = 74,473,655.49/11,947.14
  6. Step 6: Final answer
    x = 6,233.60

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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.