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Finding the Fourth Proportional to 28,213.40, 42,350.88 and 20,794.88

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Solution

The fourth proportional to 28,213.40, 42,350.88 and 20,794.88 is: 31,215.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,213.40 : 42,350.88 = 20,794.88 : x
  2. Step 2: Convert to fraction form
    28,213.40/42,350.88 = 20,794.88/x
  3. Step 3: Cross multiply
    28,213.40x = 42,350.88 × 20,794.88
  4. Step 4: Simplify right side
    28,213.40x = 880,681,467.49
  5. Step 5: Solve for x
    x = 880,681,467.49/28,213.40
  6. Step 6: Final answer
    x = 31,215.01

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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.