Home / 15,791.05-21,789.80-9,417.99

Finding the Fourth Proportional to 15,791.05, 21,789.80 and 9,417.99

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Solution

The fourth proportional to 15,791.05, 21,789.80 and 9,417.99 is: 12,995.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,791.05 : 21,789.80 = 9,417.99 : x
  2. Step 2: Convert to fraction form
    15,791.05/21,789.80 = 9,417.99/x
  3. Step 3: Cross multiply
    15,791.05x = 21,789.80 × 9,417.99
  4. Step 4: Simplify right side
    15,791.05x = 205,216,188.44
  5. Step 5: Solve for x
    x = 205,216,188.44/15,791.05
  6. Step 6: Final answer
    x = 12,995.73

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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.