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Finding the Fourth Proportional to 21,961.92, 30,300.80 and 12,529.92

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Solution

The fourth proportional to 21,961.92, 30,300.80 and 12,529.92 is: 17,287.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,961.92 : 30,300.80 = 12,529.92 : x
  2. Step 2: Convert to fraction form
    21,961.92/30,300.80 = 12,529.92/x
  3. Step 3: Cross multiply
    21,961.92x = 30,300.80 × 12,529.92
  4. Step 4: Simplify right side
    21,961.92x = 379,666,599.94
  5. Step 5: Solve for x
    x = 379,666,599.94/21,961.92
  6. Step 6: Final answer
    x = 17,287.50

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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.