Home / 15,782.31-21,790.59-9,816.66

Finding the Fourth Proportional to 15,782.31, 21,790.59 and 9,816.66

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Solution

The fourth proportional to 15,782.31, 21,790.59 and 9,816.66 is: 13,553.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,782.31 : 21,790.59 = 9,816.66 : x
  2. Step 2: Convert to fraction form
    15,782.31/21,790.59 = 9,816.66/x
  3. Step 3: Cross multiply
    15,782.31x = 21,790.59 × 9,816.66
  4. Step 4: Simplify right side
    15,782.31x = 213,910,704.28
  5. Step 5: Solve for x
    x = 213,910,704.28/15,782.31
  6. Step 6: Final answer
    x = 13,553.83

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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.