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Finding the Fourth Proportional to 15,100.80, 20,841.60 and 8,813.20

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Solution

The fourth proportional to 15,100.80, 20,841.60 and 8,813.20 is: 12,163.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,100.80 : 20,841.60 = 8,813.20 : x
  2. Step 2: Convert to fraction form
    15,100.80/20,841.60 = 8,813.20/x
  3. Step 3: Cross multiply
    15,100.80x = 20,841.60 × 8,813.20
  4. Step 4: Simplify right side
    15,100.80x = 183,681,189.12
  5. Step 5: Solve for x
    x = 183,681,189.12/15,100.80
  6. Step 6: Final answer
    x = 12,163.67

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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.