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Finding the Fourth Proportional to 28,009.56, 42,010.02 and 12,424.44

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Solution

The fourth proportional to 28,009.56, 42,010.02 and 12,424.44 is: 18,634.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,009.56 : 42,010.02 = 12,424.44 : x
  2. Step 2: Convert to fraction form
    28,009.56/42,010.02 = 12,424.44/x
  3. Step 3: Cross multiply
    28,009.56x = 42,010.02 × 12,424.44
  4. Step 4: Simplify right side
    28,009.56x = 521,950,972.89
  5. Step 5: Solve for x
    x = 521,950,972.89/28,009.56
  6. Step 6: Final answer
    x = 18,634.74

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.