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Finding the Fourth Proportional to 13,958.90, 19,262.88 and 7,990.37

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Solution

The fourth proportional to 13,958.90, 19,262.88 and 7,990.37 is: 11,026.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,958.90 : 19,262.88 = 7,990.37 : x
  2. Step 2: Convert to fraction form
    13,958.90/19,262.88 = 7,990.37/x
  3. Step 3: Cross multiply
    13,958.90x = 19,262.88 × 7,990.37
  4. Step 4: Simplify right side
    13,958.90x = 153,917,538.47
  5. Step 5: Solve for x
    x = 153,917,538.47/13,958.90
  6. Step 6: Final answer
    x = 11,026.48

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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.