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Finding the Fourth Proportional to 15,960.62, 22,003.98 and 12,971.72

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Solution

The fourth proportional to 15,960.62, 22,003.98 and 12,971.72 is: 17,883.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,960.62 : 22,003.98 = 12,971.72 : x
  2. Step 2: Convert to fraction form
    15,960.62/22,003.98 = 12,971.72/x
  3. Step 3: Cross multiply
    15,960.62x = 22,003.98 × 12,971.72
  4. Step 4: Simplify right side
    15,960.62x = 285,429,467.45
  5. Step 5: Solve for x
    x = 285,429,467.45/15,960.62
  6. Step 6: Final answer
    x = 17,883.36

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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.