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Finding the Fourth Proportional to 15,214.65, 20,995.22 and 8,499.95

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Solution

The fourth proportional to 15,214.65, 20,995.22 and 8,499.95 is: 11,729.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,214.65 : 20,995.22 = 8,499.95 : x
  2. Step 2: Convert to fraction form
    15,214.65/20,995.22 = 8,499.95/x
  3. Step 3: Cross multiply
    15,214.65x = 20,995.22 × 8,499.95
  4. Step 4: Simplify right side
    15,214.65x = 178,458,172.76
  5. Step 5: Solve for x
    x = 178,458,172.76/15,214.65
  6. Step 6: Final answer
    x = 11,729.36

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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.