Home / 11,947.14-17,900.66-7,780.91

Finding the Fourth Proportional to 11,947.14, 17,900.66 and 7,780.91

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Solution

The fourth proportional to 11,947.14, 17,900.66 and 7,780.91 is: 11,658.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,947.14 : 17,900.66 = 7,780.91 : x
  2. Step 2: Convert to fraction form
    11,947.14/17,900.66 = 7,780.91/x
  3. Step 3: Cross multiply
    11,947.14x = 17,900.66 × 7,780.91
  4. Step 4: Simplify right side
    11,947.14x = 139,283,354.35
  5. Step 5: Solve for x
    x = 139,283,354.35/11,947.14
  6. Step 6: Final answer
    x = 11,658.30

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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.