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Finding the Fourth Proportional to 15,924.43, 21,972.14 and 9,636.67

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Solution

The fourth proportional to 15,924.43, 21,972.14 and 9,636.67 is: 13,296.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,924.43 : 21,972.14 = 9,636.67 : x
  2. Step 2: Convert to fraction form
    15,924.43/21,972.14 = 9,636.67/x
  3. Step 3: Cross multiply
    15,924.43x = 21,972.14 × 9,636.67
  4. Step 4: Simplify right side
    15,924.43x = 211,738,195.40
  5. Step 5: Solve for x
    x = 211,738,195.40/15,924.43
  6. Step 6: Final answer
    x = 13,296.44

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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.