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Finding the Fourth Proportional to 21,754.01, 30,013.40 and 12,192.50

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Solution

The fourth proportional to 21,754.01, 30,013.40 and 12,192.50 is: 16,821.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,754.01 : 30,013.40 = 12,192.50 : x
  2. Step 2: Convert to fraction form
    21,754.01/30,013.40 = 12,192.50/x
  3. Step 3: Cross multiply
    21,754.01x = 30,013.40 × 12,192.50
  4. Step 4: Simplify right side
    21,754.01x = 365,938,318.54
  5. Step 5: Solve for x
    x = 365,938,318.54/21,754.01
  6. Step 6: Final answer
    x = 16,821.65

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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.