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Finding the Fourth Proportional to 15,213.80, 20,994.88 and 8,500.10

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Solution

The fourth proportional to 15,213.80, 20,994.88 and 8,500.10 is: 11,730.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,213.80 : 20,994.88 = 8,500.10 : x
  2. Step 2: Convert to fraction form
    15,213.80/20,994.88 = 8,500.10/x
  3. Step 3: Cross multiply
    15,213.80x = 20,994.88 × 8,500.10
  4. Step 4: Simplify right side
    15,213.80x = 178,458,579.49
  5. Step 5: Solve for x
    x = 178,458,579.49/15,213.80
  6. Step 6: Final answer
    x = 11,730.05

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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.