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Finding the Fourth Proportional to 13,959.51, 19,262.49 and 7,990.83

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Solution

The fourth proportional to 13,959.51, 19,262.49 and 7,990.83 is: 11,026.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,959.51 : 19,262.49 = 7,990.83 : x
  2. Step 2: Convert to fraction form
    13,959.51/19,262.49 = 7,990.83/x
  3. Step 3: Cross multiply
    13,959.51x = 19,262.49 × 7,990.83
  4. Step 4: Simplify right side
    13,959.51x = 153,923,282.97
  5. Step 5: Solve for x
    x = 153,923,282.97/13,959.51
  6. Step 6: Final answer
    x = 11,026.41

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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.