Home / 21,190.70-31,800.45-11,830.70

Finding the Fourth Proportional to 21,190.70, 31,800.45 and 11,830.70

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Solution

The fourth proportional to 21,190.70, 31,800.45 and 11,830.70 is: 17,754.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,190.70 : 31,800.45 = 11,830.70 : x
  2. Step 2: Convert to fraction form
    21,190.70/31,800.45 = 11,830.70/x
  3. Step 3: Cross multiply
    21,190.70x = 31,800.45 × 11,830.70
  4. Step 4: Simplify right side
    21,190.70x = 376,221,583.82
  5. Step 5: Solve for x
    x = 376,221,583.82/21,190.70
  6. Step 6: Final answer
    x = 17,754.09

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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.