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Finding the Fourth Proportional to 15,911.50, 21,957.99 and 9,946.68

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Solution

The fourth proportional to 15,911.50, 21,957.99 and 9,946.68 is: 13,726.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,911.50 : 21,957.99 = 9,946.68 : x
  2. Step 2: Convert to fraction form
    15,911.50/21,957.99 = 9,946.68/x
  3. Step 3: Cross multiply
    15,911.50x = 21,957.99 × 9,946.68
  4. Step 4: Simplify right side
    15,911.50x = 218,408,940.45
  5. Step 5: Solve for x
    x = 218,408,940.45/15,911.50
  6. Step 6: Final answer
    x = 13,726.49

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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.