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Finding the Fourth Proportional to 21,929.50, 30,263.43 and 11,993.50

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Solution

The fourth proportional to 21,929.50, 30,263.43 and 11,993.50 is: 16,551.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,929.50 : 30,263.43 = 11,993.50 : x
  2. Step 2: Convert to fraction form
    21,929.50/30,263.43 = 11,993.50/x
  3. Step 3: Cross multiply
    21,929.50x = 30,263.43 × 11,993.50
  4. Step 4: Simplify right side
    21,929.50x = 362,964,447.71
  5. Step 5: Solve for x
    x = 362,964,447.71/21,929.50
  6. Step 6: Final answer
    x = 16,551.42

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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.