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Finding the Fourth Proportional to 28,899.40, 43,349.10 and 20,144.20

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Solution

The fourth proportional to 28,899.40, 43,349.10 and 20,144.20 is: 30,216.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,899.40 : 43,349.10 = 20,144.20 : x
  2. Step 2: Convert to fraction form
    28,899.40/43,349.10 = 20,144.20/x
  3. Step 3: Cross multiply
    28,899.40x = 43,349.10 × 20,144.20
  4. Step 4: Simplify right side
    28,899.40x = 873,232,940.22
  5. Step 5: Solve for x
    x = 873,232,940.22/28,899.40
  6. Step 6: Final answer
    x = 30,216.30

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Similar ratio
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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.