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Finding the Fourth Proportional to 18,965.88, 28,437.30 and 9,726.84

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Solution

The fourth proportional to 18,965.88, 28,437.30 and 9,726.84 is: 14,584.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,965.88 : 28,437.30 = 9,726.84 : x
  2. Step 2: Convert to fraction form
    18,965.88/28,437.30 = 9,726.84/x
  3. Step 3: Cross multiply
    18,965.88x = 28,437.30 × 9,726.84
  4. Step 4: Simplify right side
    18,965.88x = 276,605,067.13
  5. Step 5: Solve for x
    x = 276,605,067.13/18,965.88
  6. Step 6: Final answer
    x = 14,584.35

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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.