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Finding the Fourth Proportional to 28,996.80, 40,014.24 and 16,420.80

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Solution

The fourth proportional to 28,996.80, 40,014.24 and 16,420.80 is: 22,659.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,996.80 : 40,014.24 = 16,420.80 : x
  2. Step 2: Convert to fraction form
    28,996.80/40,014.24 = 16,420.80/x
  3. Step 3: Cross multiply
    28,996.80x = 40,014.24 × 16,420.80
  4. Step 4: Simplify right side
    28,996.80x = 657,065,832.19
  5. Step 5: Solve for x
    x = 657,065,832.19/28,996.80
  6. Step 6: Final answer
    x = 22,659.94

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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.