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Finding the Fourth Proportional to 28,991.98, 40,008.35 and 16,245.01

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Solution

The fourth proportional to 28,991.98, 40,008.35 and 16,245.01 is: 22,417.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,991.98 : 40,008.35 = 16,245.01 : x
  2. Step 2: Convert to fraction form
    28,991.98/40,008.35 = 16,245.01/x
  3. Step 3: Cross multiply
    28,991.98x = 40,008.35 × 16,245.01
  4. Step 4: Simplify right side
    28,991.98x = 649,935,764.57
  5. Step 5: Solve for x
    x = 649,935,764.57/28,991.98
  6. Step 6: Final answer
    x = 22,417.78

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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.