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Finding the Fourth Proportional to 28,991.89, 40,012.03 and 16,247.14

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Solution

The fourth proportional to 28,991.89, 40,012.03 and 16,247.14 is: 22,422.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,991.89 : 40,012.03 = 16,247.14 : x
  2. Step 2: Convert to fraction form
    28,991.89/40,012.03 = 16,247.14/x
  3. Step 3: Cross multiply
    28,991.89x = 40,012.03 × 16,247.14
  4. Step 4: Simplify right side
    28,991.89x = 650,081,053.09
  5. Step 5: Solve for x
    x = 650,081,053.09/28,991.89
  6. Step 6: Final answer
    x = 22,422.86

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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.